For water, I used something like the locking crock, but it fit into the corner. It worked really well. Munch was much bigger than Oslo (like 4-5 lbs), and he could've tipped over anything.

You said his food rots after a few days, how often do you clean it? I cleaned everysingleday... it was just icky if I didn't.

Also, Munch lived in a x-large wire dog crate, they're actually perfect for buns! They have a nice plastic tray and are safe from chewing, and bigger than pet store cages.