In the Canberra B15 there was a bladder with a metal funnel and cap, usually stored on the floor between the two navigator's bang seats. There was only the aircraft skin between the said device and the outside air temperature of minus 50. After a long transit at height it would be the same temp as the outside air. One day en-route from HK to Singapore the pilot had need of said device. After adjusting his harness and clothing he applied his member to said frozen device. The subsequent rapid removal also removed a large piece of skin!! Very painful and as it was only a couple of weeks after his honeymoon new wifey was not impressed!!
A similar device was also in the Victor 1. One day the Captain used the device, and as he passed it back to a rear crew member, the bung in the bottom fell out depositing the contents onto the fuel system control panel. Carefully returned to Marham and debriefed the groundcrew about the " Spillage of Liquid over the fuel tray" " I know sir, I tasted it - Orange Squash wasn't it" "Yes Chief"