I'd really like to start using disposable deli cups for water dishes as I've seen in some professional breeder's setups. I hate cleaning out water dishes and it's really gross when my snakes poop in them (It doesn't happen a lot, but a few times is enough). I'd rather just toss a plastic deli cup instead of wash a bowl in my dishwasher.

My question is where can I find them? I went to my local Costco and they only had 2 oz soufflé cups. I have a Sam's Club nearby but don't have a membership so I can't check there. Any other ideas as to where to pick them up?