Hi guys! My ball pythons often push their water bowls around and damp the substrates and rise the humidity...and make substrates in their water bowls. Also the substrates stick on the bottom of the water bowls which make it hard to clean. I saw the idea of deli cups+pvc holders here in some posts and it looks like an amazing solution!

So may I know what size of deli cups I should get and which pvc holders match the cups?
And where should I get them?
Do I need to use silicone to attach the pvc ring to the tub to make it not be moved by the snakes or it's no necessary?
Can I wash the deli cups and reuse it? How often do you replace or wash it?
Thank you so much for your help!!