be careful with insects in your food

have u ever seen ants swimming in your drink?? i went cafe hv a drink my sister yesterday, i ordered a drink which green tea at the bottom of the tea, after i stir it, lots of ants start floating in my drink, and the problem is i din realize about it...until i drunk til half and feel abit sour in my mouth, ah my god, tat is ANT. mayb u think ants is no poison insert, but tat is not normal ant, it is a bit bigger than normal 1 and taste sour, and i lax for 2 days...haiz......