That sounds like a Travel John
https://www.amazon.com/dp/B000NV878S/ref=sxr_zg_dy_1?pf_rd_m=ATVPDKIKX0DER&pf_rd_p=3525 596382&pd_rd_wg=0RBYs&pf_rd_r=0YWJB70TRE21H06DDDYJ &pf_rd_s=desktop-rhs-carousels&pf_rd_t=301&pd_rd_i=B000NV878S&pd_rd_w=3 UFmQ&pf_rd_i=travel%2Bjohn&pd_rd_r=c2a716d2-0804-4af7-9716-5552ac6f05a8&ie=UTF8&qid=1524668814&sr=1&th=1&psc= 1.

On 4/24/2018 8:28 PM, Poppy Puppy wrote:
Some years ago a friend had a pee receptacle that, when stored, looked like a 35mm film container (remember those?), but contained a bladder that held about a litre of fluid.
Does anyone know of the product its name, and who stocks them?

--
Dan, 5J