You can also find them laying around the park, wash it out and get refills for 99 cents.
And unless you have at least 13 refills, that is far cheaper.
And like alreday stated the park forces you to pay a buck for a locker each time you want to get on a ride that has one, which is most of the top rides in the park.
And remember you do get free ice water all day at most concession stands just by asking for it!!
Don't the cups have little clips on them... you can pour out the soda (so it isnt so heavy)... clip it on ... then go on the ride. Well i might work Or you can hide it in like a bush.. but there is always the risk of it getting stolen.
I got a souvineir sports bottle one day, and they gave me a wristband for free refils. When I was leaving the park I stoped in home town square to refil it, and the guy refused to refil it, even though I had the wristband. He said it was agaist the rules and no one should be doing it. He obviously didn't know what he was doing, like lots of employes at six flags (plus he could of just looked at the poster behind him).
The second week I was at the park, I got a wristband after I bought the cup, but the vendor never put a date on it. It was blank. I have been using the same wristband for over a 1 1/2 months and getting free refills. Don't know how much longer I can use it since it is starting to show a lot of wear and tear.
If it walks like socialist, quacks like socialist, smells like a socialist, .... it's a socialist. Hope, and change we can believe in.