https://www.amazon.com/NEATER-PET-BRANDS-Big-Bowl/dp/B07F38QBYC I’ve got one of these for my juvenile blood python and it’s great. He’s about 3.5’ and weighs 4 lbs currently, and the 1.25 gallon bowl is plenty big for him to fit inside and completely submerge. They also make a 2.25 gallon bowl for even larger snakes.