Small foldable bathtub. When I say small, I mean still big enough to drown myself if I wanted to.
Along with that I also bought a suction cup phone holder for cars that I put on the wall. Hands free YouTube videos while soaking in almost boiling water.
Foldable bathtub? Then why limit yourself with watching YouTube on phone? Put the foldable bathtub in your living room and watch YouTube on your TV instead.
You can always use a garden hose to siphon the bath water out though, just like siphoning out gas from a car's fuel tank. Just be careful not to accidentally drink the bath water if you use your mouth.