I was curious if there is a certain type of plastic I should be using with a tub. I'm soon going to purchase a baby Leopard Gecko and I'm putting her in a tub. I will attach a UTH to the bottom of it.

All of the smaller tubs (16ish QT) at Target seem to be made out of pretty soft plastic... The ones I looked at are all Sterilite. Will the UTH melt and warp this softer plastic or should it be fine at the UTH's temps?

Thank you!