A barista shows how the latest sugar-packed bubble tea craze is made - with an adorable marshmallow pig lazing on top.

The drink featuring the cute animal has become popular over the last couple months after locals and tourists posted pictures online of the squishy sleepy pink piglets on their tea.

Sales of the drink are soaring - despite warnings this week from the World Heath Organisation (WHO) that there are dangerous levels of sugar in bubble tea that could cause health problems.

Footage taken yesterday (11/07) at the shop in Bangkok, Thailand, shows how the drink is prepared - with a thick layer of cream forming the 'bed' on top of the cold bubble tea for the pig to sleep on.

Brown sugar is sprinkled onto the cream topping, which is then blow torched to make it melt. The marshmallow piggy is added at the end.

The viral trend for the bubble tea with marshmallow pigs on top comes as the WHO this week warned that bubble tea drinks - booming in popularity across Asia - exceed the recommended upper limit of the daily sugar intake recommended by health chiefs at the organisation.

Watchdogs checked 25 brands of bubble tea and found that almost all of them had ''an excessive amount of sugar''.

According to the Bangkok Post, the agency said it collected its samples in Thailand under the criteria that they were all the same regular size with no ice and with each cup priced between 23 baht to 140 baht. The samples were taken for laboratory testing to check for calories, sugar, fat, and heavy metals like lead and preservatives.

The result showed that only two brands - KOI Thé and TEA 65° - has an amount of sugar per glass lower than the recommended upper limit of daily sugar intake as recommended by the WHO.

The sample size was representative and did not cover the entire bubble tea market in Thailand which has hundreds of brands.