So we use a plastic tub for our BP. The issue is that we need to use a heat lamp to bump ambient temps, and even with it suspended and dimmed way low, the plastic tub lid dips and gets soft. Not melted, but not ideal. Additionally, the lid has gotten weak over time and the locking handles no longer stay secure so the lid has to be secured with weights(until we get some clips). The last issue is our new cat LOVES hopping on top of the tub which isn't helping with the dipping.

Does anyone have ideas for how to fix up a different type of lid for a tub? I just wish I could get a hard, solid lid with a metal mesh portion for the heat lamp. Does anyone have ideas for how to rig this? Am I better off just buying a pricey tank instead? I'd love to hear some ideas.