I would be interested in anybody has this information also (Im sort of a compulsive planner and want to see if what ive budgeted for our 2 PI ventures is enough!)
However, to SORT OF answer your question, the prices at PI are about the same you'd find in disney parks or resorts. Some of the special mixed drinks, such as those in the Adventurers club are a little more pricey (7-8 bucks I believe) but yummy and pretty large. There are also vendors on the streets that sell test tube shots, jello shooter, syringe shots for 2-3 bucks a pop.