I found sets of ceramic tiles on amazon for inexpensive. I bought a set. 2 are stuck together, which is fine, it went in Teddy's cage. She does use it to lay on for cool down.
Candy I used 1 of the tiles, placed it in front of her water bottle, to catch drips.
And another up on her handmade landing- I've not seen her lay on it, but it's there if she needs to cool down.