What is the syrup in kratom/smoke shops?

I bought some kratom tea from Bai kratom and cannabis up past the old town and the guy has hundreds of tiny bottles of “syrup”. Why? Do kids mix it with kratom or something to sweeten it? They had an enormous range of these tiny bottles. The guy didn’t speak much English so couldn’t explain. I heard people mix it with cough syrup but these just seemed to be flavoured syrup.

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