LMW, I think that if you "fear" to eat/drink before your T you could accept his offer as a way to challenge yourself?
Cause I though about it and it always makes me happy if I can do stg nice for the ppl around me and igets pretty lonely being the only one who eats/drinks. Futhermore, one day I bet you'll be able to buy him a cookie/coffee.

So yes I would- at least try to- say yes, I'll have...Thank you T.