The caps on these five-gallon fuel cans don’t fit very well and are easy to lose.
A 1/2″ PVC pipe cap fits perfectly and won’t come off unless you pull it off.

Western Horse Watchers Association
Exposing the Hypocrisy, Lies and Incompetence of the Wild Horse Advocates
The caps on these five-gallon fuel cans don’t fit very well and are easy to lose.
A 1/2″ PVC pipe cap fits perfectly and won’t come off unless you pull it off.
