Hell no. Acid and createine do not mix. Even grape juice has ascorbic acid added to it so it's a no-go.
Best case scenario: put just the powder into a sports bottle in your bag. Fill it with water from the fountain immediately prior to drinking it.
Works great for protein shakes: 2 scoops plain whey, a scoop dextrose, a Tbsp. malted milk in the bottom of a bottle. Mix it up right before my last set and gulp it down immediately after. Perfect Timing!
BTW do you take your creatine before or after you WO? If you do it after it will be a little better with the protein and sugar. IF you drink it alone as I'm sure you know it's like drinking sand.
JC