The Smart Crock has a grooved "screw" with a slit in it, sticking out the side of the crock, at the top. A vertical bar of the crate fits in the slit. Then a "cap" screws onto the part on the outside of the crate. Each to take off and put on. I manage the Colorado House Rabbit Society. We...
Most rabbits don't fully hydrate with a bottle. They do with a bowl. Use a heavy clay crock or a Smart Crock. Do a google search on "Smart Crock" for pictures and ways to order.