"They" "Their"? That'd be my main suggestion, separate them into their own cages. Cohabitation of corns is a bad idea all around. They're not rodents who like company and get lonely.
- They can pass diseases/parasites to one another.
- They can stress the other one out, which in snakes, can cause a whole rash of other problems.
- And ultimately, they can potentially eat each other.
And since most folks are inept at using the search button these days...
Within you shall find loads of information and links on why you shouldn't house them together..
Click me!
Other than that, scrap the bottle. You'll never get one out when you need to.
And I'd move the water bowl over to the left or its going to get bedding from the upstairs into it. Plus it looks like your UTH may be on the left side, and moving the water bowl over top of the warm floor will increase evaporation and help with humidity within the cage.
Looks good otherwise. =)