Traditional medicines cook at Khuong Vien traditional medical shop in Hanoi, Vietnam May 22, 2018. REUTERS/Kham

An employee pours custard fillings into tart cases before baking egg tarts at the traditional Cantonese confectionery Tong Heng in Singapore April 21, 2018. REUTERS/Loriene Perera

A kettle stands on a stove in Ivan Shamyanok's house in the village of Tulgovichi, near the exclusion zone around the Chernobyl nuclear reactor, Belarus April 2, 2016. Shamyanok, 90, says the secret to a long life is not leaving your birthplace even when it is a Belarusian village poisoned with radioactive fallout from a nuclear disaster. In April 1986, a botched test at a nuclear plant in Chernobyl, Ukraine, sent clouds of smouldering nuclear material across swathes of Europe and forced more than 100,000 people to leave a permanently contaminated "exclusion zone". April 26, 2016 marks the 30th anniversary of the worst nuclear meltdown in history. REUTERS/Vasily Fedosenko SEARCH "EXCLUSION IVAN" FOR THIS STORY. SEARCH "THE WIDER IMAGE" FOR ALL STORIES

Guests brew coffee during a wedding ceremony for a Free Syrian Army fighter in the town of Douma, eastern Ghouta in Damascus, Syria January 19, 2016. Picture taken January 19, 2016. REUTERS/Bassam Khabieh

A kettle and saucepan are seen as a migrant prepares his food next to shelters in a muddy field called the Grande-Synthe jungle, near Dunkirk, northern France, January 12, 2016. The Grande-Synthe jungle is a camp of tents and makeshift shelters where migrants and asylum seekers from Irak, Kurdistan and Syria gather. REUTERS/Benoit Tessier

A migrant prepares a meal next to shelters in a muddy field called the Grande-Synthe jungle, near Dunkirk, northern France, January 12, 2016. The Grande-Synthe jungle is a camp of tents and makeshift shelters where migrants and asylum seekers from Irak, Kurdistan and Syria gather. REUTERS/Benoit Tessier

A kettle sits on a wall along Warwick Road in the town of Carlisle in northwest England, Britain December 8, 2015. Two people have died and hundreds of others have been forced to leave homes flooded by record heavy rainfall. REUTERS/Andrew Yates

Tibetan women sit behind a solar cooker in front of small house at Namtso lake in the Tibet Autonomous Region, China November 18, 2015. Located four hours' drive from Lhasa at an altitude of around 4,718m (15,479 ft) above sea level, Namtso lake is not only the highest saltwater lake in the world but also considered sacred, attracting throngs of devotees and pilgrims. REUTERS/Damir Sagolj

Tea pots are pictured on the ground of the tent where Ahmad, a Syrian man from Idlib, lives with his family near the banks of Nahr Ibrahim river, in Mount Moussa nature reserve July 13, 2015. Ahmad, who has four children, burns wood to make charcoal for a living and lives with his family in the tent by the river banks within the nature reserve. Ahmad makes between $1 and $3 for every kilogram of charcoal he sells. Picture taken July 13, 2015. REUTERS/Alia Haju TPX IMAGES OF THE DAY

Domitila Vaca stands in their flooded home in the Mapajo neighbourhood in Cobija, Pando Department, bordering Brazil February 27, 2015. More than two thousand people have been left homeless along the Bolivian-Brazilian border where incessant rains have flooded the area and caused the Acre and Tahuamanu Rivers to burst their banks. Damage has been heaviest in the northern Bolivian city of Cobija, the capital of Pando, and in Brasilea, Brazil, which lies across the border. REUTERS/David Mercado (BOLIVIA - Tags: ENVIRONMENT DISASTER TPX IMAGES OF THE DAY)

Berber women wash a child in Ait Sghir village in the High Atlas region of Morocco February 14, 2015. The snowy foothills of the High Atlas mountains in Morocco are home to several Berber villages where the inhabitants make their living by farming, baking bread in traditional ovens, herding cattle, and the making and selling of honey, olive oil and pottery. Extreme weather fluctuations and erosion that causes flooding and landslides have led to a drop in agricultural productivity, the United Nations said. REUTERS/Youssef Boudlal (MOROCCO - Tags: TRAVEL SOCIETY TPX IMAGES OF THE DAY)

ATTENTION EDITORS: PICTURE 17 OF 24 FOR WIDER IMAGE PACKAGE 'LIFE IN THE ATLAS MOUNTAINS'

TO FIND ALL IMAGES SEARCH 'ATLAS BOUDLAL'

A Palestinian woman fills a kettle with water from a tank placed outside her house, that witnesses said was damaged by Israeli shelling during the July-August war between Israel and Hamas-led Gaza militants, in the east of Gaza City January 4, 2015. REUTERS/Suhaib Salem (GAZA - Tags: POLITICS CIVIL UNREST)

Palestinians make tea on a fire next to the ruins of their house, which witnesses said was destroyed during the Israeli offensive, on the fifth day of ceasefire in Khan Younis in the southern Gaza Strip August 18, 2014. Talks in Cairo on ending the Gaza war showed no signs of a breakthrough on Monday, with Israel and the Palestinians entrenched in their demands hours before the expiry of a five-day ceasefire. REUTERS/Ibraheem Abu Mustafa (GAZA - Tags: POLITICS CIVIL UNREST CONFLICT)

Water is boiled using solar power in Khumjung, approximately 3700 meters above sea level in Solukhumbu District April 30, 2014. More than 4,000 climbers have reached the summit of Everest, the world's highest peak, since it was first scaled by Sir Edmund Hillary and Tenzing Norgay Sherpa in 1953. In April, an avalanche killed 16 Nepali Sherpa guides who were fixing ropes and ferrying supplies for their foreign clients to climb the 8,850-metre (29,035-foot) peak. The accident - the deadliest in the history of Mount Everest - triggered a dispute between sherpa guides who wanted a climbing ban in honour of their colleagues and the Nepali government that refused to close the mountain. The sherpas staged a boycott, forcing hundreds of foreign climbers to call off their bids to climb Everest. Picture taken April 30, 2014. REUTERS/Navesh Chitrakar (NEPAL - Tags: ENVIRONMENT SOCIETY BUSINESS EMPLOYMENT TRAVEL)

ATTENTION EDITORS: PICTURE 27 OF 45 FOR PACKAGE 'AFTER THE AVALANCHE - ASCENT TO EVEREST'
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A woman serves herself some tea at a bar in the tourist area of the Andalusian capital of Seville April 22, 2014. REUTERS/Marcelo del Pozo (SPAIN - Tags: SOCIETY TRAVEL TPX IMAGES OF THE DAY)

A boy carrying a teakettle reacts as he walks through smoke caused during fumigation by municipal workers on the banks of the river Ganga in the northern Indian city of Allahabad January 28, 2014. REUTERS/Jitendra Prakash (INDIA - Tags: SOCIETY)

A vendor prepares tea at his roadside stall on a cold winter morning in the old quarters of Delhi January 3, 2014. REUTERS/Ahmad Masood (INDIA - Tags: SOCIETY FOOD)

Saudi men make tea by a fire as they sit in a tent during a snowstorm in Alkan village, west of Saudi Arabia December 13, 2013. REUTERS/Mohamed Alhwaity (SAUDI ARABIA - Tags: ENVIRONMENT SOCIETY)

Bara'a, a Syrian girl who fled with her family the violence from Jarajir, near the southern town of Qara, washes her doll's hair outside a tent, at the Lebanese border town of Arsal, in the eastern Bekaa Valley November 20, 2013. Syria's army said it pushed rebels out of the southern town of Qara on Tuesday, strengthening its hold on a highway linking the capital to government strongholds along the Mediterranean coast. REUTERS/Mohamed Azakir (LEBANON - Tags: POLITICS CIVIL UNREST SOCIETY IMMIGRATION CONFLICT)

Free Syrian Army fighters use poster of Syria's President Bashar al-Assad to start a fire for heat and making tea in Aleppo November 16, 2012. Picture taken November 16, 2012. REUTERS/Zain Karam (SYRIA - Tags: CIVIL UNREST POLITICS CONFLICT)

A gas cooker is seen in Boroughbridge, northern England November 13, 2012. British energy regulators on Monday said they are investigating claims made by a whistleblower that UK traders have manipulated wholesale prices on Europe's biggest gas market. REUTERS/Nigel Roddis (BRITAIN - Tags: ENERGY BUSINESS)

A volunteer takes a kettle from a bonfire near the remote village of Budy, about 220 km (137 miles) north of Minsk August 6, 2012. BirdLife Belarus (APB) volunteers build and repair dams in the marsh to raise water level in lakes, for protection from summer fires and to preserve a natural habitat for endangered birds in the region. Picture taken August 6, 2012. REUTERS/Vasily Fedosenko (BELARUS - Tags: ENVIRONMENT SOCIETY)

Ethnic Uighur children fetch water from an underground water pipe at an old residential area of Kashgar, Xinjiang Uighur Autonomous Region July 22, 2012. Picture taken July 22, 2012. REUTERS/Rooney Chen (CHINA - Tags: SOCIETY)

An Afghan boy pours tea for Afghan National Army soldiers working with Chosen Company of the 3rd Battalion (Airborne), 509th Infantry on a helicopter assault mission to improve their biological database, near the town of Ahmad Khel in Afghanistan's Paktiya Province July 16, 2012. Picture taken July 16. REUTERS/Lucas Jackson (AFGHANISTAN - Tags: CIVIL UNREST MILITARY)

A boy reacts during a food distribution from an international Non-government Organization (NGO) in Mogadishu June 30, 2012. REUTERS/Goran Tomasevic (SOMALIA - Tags: FOOD SOCIETY)

An Afghan National Police officer pours a cup of tea for visiting U.S. soldiers from Bravo troop, 1st Squadron of the 75th Cavalry Regiment, 2nd Brigade of the 101st Airborne Division during an advising mission to their base in Afghanistan's Kunar Province June 25, 2012. REUTERS/Lucas Jackson (AFGHANISTAN - Tags: CIVIL UNREST MILITARY)

Kettles of tea boil on a fire in the kitchen of an Afghan National Police station near the city of Mara Wara in Afghanistan's Kunar Province June 25, 2012. REUTERS/Lucas Jackson (AFGHANISTAN - Tags: SOCIETY)

An internally displaced woman prepares tea outside their makeshift shelter at a camp in the Hodan district of Somalia's capital Mogadishu May 9, 2012. After al Qaeda-linked al Shabaab rebels pulled out of the capital last year, the United States has stepped up efforts to train Ugandan soldiers who will be part of the push by AMISOM to take more territory outside the capital. REUTERS/Feisal Omar (SOMALIA)

Ismail, 14, a Pashtun boy pours hot water from a kettle into pot while making tea for customers along a roadside stall in Quetta on February 1, 2012. REUTERS/Naseer Ahmed (PAKISTAN - Tags: SOCIETY BUSINESS EMPLOYMENT FOOD)

An employee pours boiling water into a pot at a restaurant built with ice cubes during the 28th Harbin International Ice and Snow Festival in Harbin, Heilongjiang province January 6, 2012. Picture taken January 6, 2012. REUTERS/Sheng Li (CHINA - Tags: TRAVEL SOCIETY)

Buddhist monks carrying kettles run towards the complex to serve tea to the devotees attending a teaching session being addressed by the Tibetan spiritual leader the Dalai Lama on the second day of the Kalachakra festival in the eastern Indian city of Bodhgaya January 2, 2012. The Kalachakra is a 10-day festival comprising Buddha teachings and meditations taking place at Bodhgaya, where Buddha is said to have gained enlightenment. REUTERS/Jitendra Prakash (INDIA - Tags: RELIGION SOCIETY)

An Afghan man Mir Ali, 22, is silhouetted against the setting sun as he serves green tea to a customer in Karachi December 18, 2011. REUTERS/Athar Hussain (PAKISTAN - Tags: SOCIETY)

Bibi Sahiba prepares fire wood for her stove in Kabul December 2, 2011. Kabul's residents have called on delegates at next week's international talks on Afghanistan in Bonn to put their needs on the agenda, saying the government is not doing enough to alleviate poverty and hunger in the Afghan capital. Picture taken December 2, 2011. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: SOCIETY TPX IMAGES OF THE DAY)

Ada May Roberts (reflected in the coffee pot) prepares breakfast for guests at the Amelia Payson House Bed and Breakfast in Salem, Massachusetts October 30, 2011. Ada May Roberts was among the first to sign up for health insurance through Massachusetts Health Connector after then Governor Mitt Romney signed legislation to require and help provide health insurance for all Massachusetts residents. To match Special Report ROMNEY/HEALTHCARE REUTERS/Brian Snyder (UNITED STATES - Tags: HEALTH POLITICS)

A Galanz employee tests electric kettles at a production line in a factory in Zhongshan, southern Chinese province of Guangdong November 12, 2011. Galanz is a Chinese company and the largest producer of microwave ovens in the world. REUTERS/Tyrone Siu (CHINA - Tags: ENERGY ENVIRONMENT BUSINESS)

A Taureg man prepares tea during the "Cure Salee" festival in Ingal September 17, 2011. Tuareg, Peul and Wodaabe nomads congregate each year at the salt flats around the northern oasis town of Ingal for the "Cure Salee" (salt cure), where their camels, cattle, sheep and goats drink the mineral-rich water after months on the move. Niger's nomads have held the three-day long event for centuries to mark the end of the rains, exchanging news and information amid music and dance as they prepare their animals over several weeks for the dry season. REUTERS/Luc Gnago (NIGER - Tags: SOCIETY ANNIVERSARY)

An anti-Gaddafi fighter makes tea in Al-Noflea, the closest area to the city of Sirte, 450 km west of Benghazi, towards Om El Khanfousa September 6, 2011. REUTERS/Esam Al-Fetori (LIBYA - Tags: POLITICS CIVIL UNREST MILITARY CONFLICT TPX IMAGES OF THE DAY)

A boy is offered milk as he participates during the parade to mark the Gaijatra festival also known as "cow festival," in Kathmandu August 14, 2011. Hindus in Kathmandu celebrate the festival to ask for salvation and peace for their departed loved ones. Gaijatra is also known as "cow festival," as the cow is regarded as a holy animal that helps departed souls reach heaven. REUTERS/Navesh Chitrakar (NEPAL - Tags: RELIGION SOCIETY)

A woman, internally displaced by heavy floods a year ago, passes a kettle of tea to her husband in preparation to break their fast during the holy month of Ramadan at a camp for flood victims in Nowshera, northwest Pakistan August 2, 2011. The 2010 Pakistan floods affected 20 million people and left about 2000 dead. REUTERS/Fayaz Aziz (PAKISTAN - Tags: POLITICS DISASTER ENVIRONMENT)

A newly arrived refugee woman from Baidoa in Somalia prepares tea as she camps outside Ifo refugee camp in Dadaab, near the Kenya-Somalia border, July 30, 2011. The whole of drought- and conflict-wracked southern Somalia is heading into famine as the Horn of Africa food crisis deepens, the United Nations said. In a report for countries sending aid, the U.N.'s umbrella humanitarian agency OCHA said the "crisis in southern Somalia is expected to continue to worsen through 2011, with all areas of the south slipping into famine". REUTERS/Thomas Mukoya (KENYA - Tags: SOCIETY CIVIL UNREST DISASTER ENVIRONMENT)

A Tibetan monk adds oil to oil lamps at Tibetan Youth Club in Kathmandu April 18, 2011. REUTERS/Navesh Chitrakar (NEPAL - Tags: RELIGION)

Fumiko Suzuki (L) and her friend Aiko Takahashi, who were evacuated from Minami Soma in Fukushima, sit next to a stove at an evacuation center in Yonezawa, northern Japan, 98 km (61 miles) from the Fukushima nuclear plant, March 21, 2011. The March 11 earthquake and tsunami left more than 21,000 people dead or missing and will cost an already beleaguered economy some $250 billion, making it the world's costliest ever natural disaster. REUTERS/Yuriko Nakao (JAPAN - Tags: DISASTER)

An evacuee prepares dinner in a makeshift shelter converted from a temple at Minamisanriku town, Miyagi Prefecture in northern Japan, days after the area was devastated by a magnitude 9.0 earthquake and tsunami March 16, 2011. About 30 survivors gathered in the temple and lived together after their homes were destroyed by the disaster. REUTERS/Jo Yong-Hak (JAPAN - Tags: DISASTER ENVIRONMENT)

An Afghan man washes his feet outside his shop in the town of Musa Qala in southern Afghanistan's Helmand province, October 19, 2010. REUTERS/Finbarr O'Reilly (AFGHANISTAN - Tags: SOCIETY)

EDITORS' NOTE: Reuters and other foreign media are subject to Iranian restrictions on leaving the office to report, film or take pictures in Tehran.

An Iranian Shi'ite Muslim serves tea as the others attend a mass prayer ceremony before breaking their fast during the month of Ramadan at a mosque in northern Tehran August 27, 2010. REUTERS/Morteza Nikoubazl (IRAN - Tags: RELIGION)

A man pours tea in his store in a souk in Marrakesh July 12, 2010. REUTERS/Lucy Nicholson (MOROCCO - Tags: SOCIETY TRAVEL)

An Afghan man cooks tea in a kettle over a fire at a brick-making factory outside Kabul July 11, 2010. Labourers, most of whom work barefoot and without gloves, earn from $3 to $8 a day depending on their working hours and the number of bricks they make. Picture taken July 11, 2010. REUTERS/Ahmad Masood (AFGHANISTAN - Tags: EMPLOYMENT BUSINESS SOCIETY)

A puppy keeps warm next to a smoldering fire in the government-sponsored home of a resettled ethnic Tamil in a resettlement camp near Vavuniya, 254 km (158 miles) north of Colombo, December 22, 2009. The Tamil civilians from this village were resettled by the government two months ago after they were displaced due to fighting during the 30-year war with the Liberation Tigers of Tamil Eelam (LTTE). REUTERS/Andrew Caballero-Reynolds (SRI LANKA - Tags: CIVIL UNREST POLITICS CONFLICT)

Children from the Batek tribe play in the jungle near their village next to the entrance of Kuala Koh National Park in the northeastern Peninsular Malaysia state of Kelantan October 21, 2009. For thousands of years, Malaysia's nomadic Batek tribe have roamed the country's ancient tropical rainforests, completely at one with their natural habitat. But now the Batek's traditional hunter-gatherer lifestyle is under severe threat from deforestation and development, and mainland Malaysia's last nomadic community may soon have no choice but to abandon their traditional life and settle down. Picture taken October 21, 2009. To match feature MALAYSIA-INDIGENOUS/ REUTERS/Zainal Abd Halim (MALAYSIA SOCIETY)

A worker takes a break at a carwash along Qabri Gora Road in Kabul November 2, 2009. With Kabul's busy and dusty roads, business is always assured at the carwash, providing about a hundred Afghan men and young boys with an income in one of the poorest countries of the world. REUTERS/Jerry Lampen (AFGHANISTAN)

A villager pours tea for U.S. soldiers from Gator Company, 2-12 Infantry, 4th Brigade during a meeting in Kharah in the Pech Valley in Afghanistan's Kunar Province August 8, 2009. REUTERS/Tim Wimborne (AFGHANISTAN ELECTIONS POLITICS CONFLICT)

Boys live in a makeshift home in rubble in Kabul, August 6, 2009. REUTERS/Lucy Nicholson (AFGHANISTAN SOCIETY)

EDITORS' NOTE: Reuters and other foreign media are subject to Iranian restrictions on their ability to film or take pictures in Tehran.
Iranian Shiite Muslims break their fast during the "Etekaf" religious ceremony at a mosque in a university in Tehran July 6, 2009. Shiite Muslims perform this three-day ceremony, where they pray and fast in mosques while away from their families, to seek repentance from God for their sins. REUTERS/Morteza Nikoubazl (IRAN RELIGION)

Internally displaced girls, who fled a military offensive in the Swat valley region, help each other wash hands at the UNHCR (United Nations High Commission for Refugees) Sheik Shahzad camp in Mardan district, about 160 km (99 miles) northwest of Pakistan's capital Islamabad June 18, 2009. REUTERS/Akhtar Soomro (PAKISTAN CONFLICT POLITICS SOCIETY IMAGES OF THE DAY)

An internally displaced man, who fled a military offensive in the Swat valley region, stands in line to collect his ration of tea at the UNHCR (United Nations High Commission for Refugees) Sheik Shahzad camp in Mardan district, about 160 km (99 miles) northwest of Pakistan's capital Islamabad, June 15, 2009. REUTERS/Akhtar Soomro (PAKISTAN CONFLICT POLITICS SOCIETY)

An internally displaced girl, who fled a military offensive in the Swat valley region, sits with her ration of tea and bread at the UNHCR (United Nations High Commission for Refugees) Sheik Shahzad camp in Mardan district, about 160 km (99 miles) northwest of Pakistan's capital Islamabad June 14, 2009. REUTERS/Akhtar Soomro (PAKISTAN CONFLICT POLITICS SOCIETY)

An internally displaced girl, fleeing military operations in Buner, squats in a queue for tea at a UNHCR camp (United Nations High Commission for Refugees) in Takht Bai , about 150 km (85 miles) north west of Pakistan's capital Islamabad, May 9, 2009. The struggle in the scenic northwestern Swat Valley, which has caused an exodus of refugees fleeing the violence, has become a test of Pakistan's resolve to fight a growing Taliban insurgency that has alarmed the United States. REUTERS/Faisal Mahmood (PAKISTAN SOCIETY POLITICS CONFLICT IMAGES OF THE DAY)

Palestinian children wait to receive bread and soup at a soup kitchen in the West Bank city of Hebron March 26, 2009. A plan by Israel's prime minister-designate Benjamin Netanyahu to put economic development for the Palestinians ahead of statehood has been greeted with scepticism by West Bank entrepreneurs. REUTERS/Nayef Hashlamoun (WEST BANK POLITICS BUSINESS FOOD DRINK)

Sixty-eight-year-old Tibetan farmer Danzeng Basa adjusts his solar powered kettle outside his recently built house in a small village outside Lhasa, Tibet February 12, 2009. A year after Tibetan rioters set parts of Lhasa ablaze, aiming their fury at migrants from elsewhere in China, the mountain city is divided between migrants looking to flee and locals short of work as tourism collapses. REUTERS/Emma Graham-Harrison (CHINA)

A Ukrainian family pray before a celebratory supper on Christmas Eve, as a tea-kettle is heated on a gas cooker, near Lviv January 6, 2009. Russia sharply cut gas flows to Europe via Ukraine on Tuesday in a dramatic worsening of a pricing dispute with Kiev that threatened to disrupt supplies as far west as Italy and Germany. REUTERS/ Gleb Garanich (UKRAINE)