Thank you all, lots of good ideas! I did watch the video about the rock. Although I like the idea, has anyone had a snake flip a water bowl with a rock in it? I just know how strong a 2500g snake could be and I don't think that one will work (although I will try if it gets to that). So far the no-tip bowl has worked and something I never thought of was cutting the paper so she cant push under and flip it that way, thats a really good idea so thank you!