A Blossoming FriendshipIf you need a small aid and don't need deep vibrations, you may be interested in this little guy. The vibrations put out here are more on the buzzy side, but are still fairly strong, all things considered. It'll fit on most fingers and doesn't get in the way during sex.
There's an o-ring on the bullet that helps keep water out if you're using it in an aqueous environment, and I'd feel comfortable fully submerging it. It's also not terribly obvious, despite not being super discreet either.
You can store them back in the original packaging or in a drawer or pouch. The silicone isn't a giant lint magnet, but I would still try to keep it from getting dusty if you can.