Question: a must buy in bangkok?
Answer: Fruit Soap. You can find all kinds of fruit soap at Chatuchak Market (a weekend market in Bangkok) with Mango soap being one of the most popular ones. ... 
Inhaler (Ya Dom in Thai) ... 
Thai Silk. ... 
NaRaYa Bag. ... 
Spa & Aroma products. ... 
Takabb Anti Cough Pill. ... 
Coconut oil. ... 
Snake Brand Prickly Heat Powder.