I'll take yours and RIchs' word on that that banj'You can get pee bags on the national health if you need them.![]()
Ikea do some great double lock zip bags that I use to keep my wallet & phone in.
smaller size http://www.ikea.com/gb/en/catalog/products/60251383/
larger size http://www.ikea.com/gb/en/catalog/products/80251382/
Typical understated Ikea design.