When I was a kid in the 1950s, when our family went on trips we always had empty (glass) Coca-Cola bottles under the seats. This was because in those days when you bought a bottled Coke, you had to either pay a deposit on the bottle or you had to leave an empty one to take its place.
I remember sometimes when my year-younger brother and I needed to pee and my father didn’t want to stop, he would tell us to pee into a Coke bottle and just hold the bottle until we stopped.
When I’ve shared this with (cut) friends, I remember a couple of times they said, “How did you get your dick into the bottle?!” My answer was, “It was easy for us to pee into a Coke bottle. All we had to do was push our foreskin overhangs into the neck of the bottle and let loose.” Easy! :biglaugh: