deli cup, you mean, single-use plastic cups? or is it more sturdy plastic cups?

how often do you use them before you throw them away? how many do you throw out, per ball python per month? or do you recycle the plastic?

just curious. i mean, for a dollar or two you can get a water cup that lasts forever and that will survive in a dishwasher.

also i think its quite alright if you go a size or two bigger than you actually need. BPs are good at swimming and can hold their breath under water, and sometimes they like to soak. so it can be used to get the humidity up.