Where to get these hide boxes?

Beside the situation of getting stuck when doubling back and spilling the water, I see the opening being perpendicular to the floor as an issue. When a snake enters that hole it will then immediately bend so that the bottom of it face is against the floor. That is not the most flexible direction for a snakes spine to bend so it seems like it would be a strain for the snake to make that move. The distance between the opening and the surface of the enclosure is too short. I also don't see the snake suddenly deciding to put there head the other way and slithering in upside down because its the more natural direction for a snake to bend. It's reminiscent of the half log hide. Seems like a cool idea, but in the end, it doesn't really serve the purpose.