[Bangkok, Thailand] Shopping in Thailand--what to buy?

I will try at least 2, if not 3, cafes daily. I have marked the following places:

Hario Cafe (not a copycat; it’s run by Hario Company)
Kurasu (another Japanese cafe; their coffee and mugs are excellent)
POUR OVER LAB @ EKKAMAI
Kaizen in Ekkamai
Roots at theCOMMONS cafe
Ceresia Coffee Roasters
…etc.

Tea shops (not chains)
TEALILY CAFE EKKAMAI
SO! Matcha
nyth