i didn't use water in my experiment i will redo it tonight. i measured the time it took for bleach, coke, and gas to eat through the cup at about 70 degrees room temperature. It would have been good to use something nuetral. I will also use milk this time so i have a base in the equation as well. But i would bet that the gas goes first then coke then bleach which is what i got before. Then i wouldn't be able to guess which will win between water or milk. but it may be just the cheaper paper wax cup breakin down but the certain products you put in it will make it break down faster.