I have a solution for you
Step 1 - Sign up for the drunk driver challenge at the Budweiser booth in RF (I think it's actually called Designated Driver something or other)
Step 2 - They will give you voucher for two free sodas.
Step 3 - Bring little bottles of alcohol to mix
Step 4 - Hope you don't get called to the field piss on a cop drunk as the winner of the Drunk Driver challenge in the 7th inning
Step 5 - profit
Or just Buy this beer belly flask