[quote=@pugbutter]
Prototype 2.0 should probably be a cylinder instead of a sphere, so then they'd drown by the time they've accumulated enough piss to reach the top and make an escape attempt. They'd have to try to swim to stay afloat and that wouldn't last more than a day or two before they exhaust themselves.
[/quote]

A cylinder would be a terrible shape. If they exhausted themselves, they could just press their hands and feet against either side to prevent themselves from drowning.