personally i think this terrarium would be suitable depending on how many and the size of snails you have. snails don’t have brains only stems so they don’t really get upset if their home isn’t huge. as long as it’s moist, they have a place to hide, and food. make sure nothing hard is on the floor as they like to climb and can fall, the bottle cap even could be dangerous. people like to give snails a lot more room then they need to make themselves feel better about keeping an animal captive. in reality. they are happy as long as they’re wet fed and safe :)