Characters can hold in incredible volumes of pee when necessary. Bladders are strong, large and and can stretch and expand to accommodate more pee. When very full the character has a firm, round bladder bulge. The volume of pee held in does not need to be realistic. Characters can hold their pee for hours or even days if necessary, but will be desperate to piss. When they do finally pee characters release huge volumes in heavy, long, powerful streams. High bladder capacity and pee-holding ability.