I think that the general stores at all of the resorts have miniatures. I think I have seen some larger bottles in the Contemporary. And, of course, you can buy bottles of wine in some of the countries in Epcot.
I've bought small bottles Vodka at both POFQ and ASSports. Then it's simply fill the refillable mug with a mixer and toss in the liquour. The mugs are good for more than just free refills.
I've seen the big bottles at the gift shops in PO-FQ & Poly (behind the Cashier) and at CR (larger selection in Fantasia Gifts). All ridiculously over priced!!
When I went with my friends, they had smirnoff behind the cashier at the gift shop (All Star Movies), it was very expensive. I think a bottle that might normally cost 3.50 in a normal liquor store costed about 7 there. Definitely try to bring some of your own.
Hi...would you mind PM'ing me with the name of the company that will deliver groceries AND alcohol? I've found a company for food only but would be great if they deliver the 'drinks' as well!