This is a Thai basil seed drink (nam manglak). It looks pretty weird, but I've been reading about it because I'm intrigued. The seeds are in a type of gelatin lump, like tapioca pearls. The drink is sweet and sometimes is flavored with vanilla, honey, rose water, peppermint, or banana. I need to find this drink.
http://heydoyou.com/basil-seed-drink-with-honey