Since I havenít found a tubular storage container that allows the angled inlet and outlet to remain attached to the hose, I store them in a plastic bin in the basement.
I close one end with this flushing cap, flush the hose, then turn off the valve (water tight) and then close the other end with this flexible cap. 100% leak free and I donít have to keep disassembling and reassembling the hoses, and my other related sewer items can live in that same bin.
I used 8 inch PVC and a section of plastic rain gutter inside to slide out. Plenty of room for elbows.
If I remember correctly I got the end caps from Amazon. It is lockable also. It;s what contractors use for conduit storage on a roof mount of a service van.
It's mounted in front of the wheels next to the dump connection which makes it convenient.