Hey. It becomes a stand-up bathtub with create water or even a shower cubicle with that and shape water. Rewarm the water with heat metal cast on the hoops. create bubbles....oh... that's not a spell.
Anything else daft?
You are approached by an exceptionally small but shifty-looking gnome artificer, carrying what looks like an oak staff. He wants to sell it to you for 100gp, which seems like a lot for a wooden staff. Especially as it radiates nothing at all.
But then he explains that this is a barrel stave and offers to demonstrate its mechanical operation. He holds it behind his back with one hand and, with the other hand, dexterously operates a concealed button about half way up its length. Springs inside twang like crossbow strings and, in an action, the stave unwraps into layer upon layer of staves that encircle him to form a complete barrel.
A flap opens in one side and out of it extends a gnomish hand, bearing an illustrated leaflet with the price clearly printed: 100gp.
The gnome's name is Mini Cooper.
What will you do?
Ask if it comes with a Pooper SCooper?
"Ah, you want the GT model with leather trim," he answers. "A wise choice. Just for you pal, because you're a good customer, we can do it on special order."
"Now, friend," he continues, "As you are about to make possibly the most important purchase of your career, allow me to demonstrate how commode-ious the barrel truly is."
DM: I want you to make an Insight check. *You roll 15* Okay, success at a cost. You realise that he is going for the hard shell sales technique.
Two secret foot-holes in the bottom could be quite amusing for stealth move and set down again. Proper cartoon/carry-on stuff.
+2 AC for cover, movement = 0, No Dex bonus to AC vs melee attacks. 1/2 movement to get in or out of it.