Originally Posted by travlineasy
The biggest problem with the new containers comes when they sit in the sun for several hours. The gas expands, the can resembles a balloon, and you must looses the cap and allow those explosive vapors to escape. Then, after tightening the cap, the sun goes down, the temperature falls, and the plastic can caves in like it was stepped on by the Jolly Green Giant. Totally idiotic.
Keeping your cans enclosed in covers of a light-colored fabric (plastic fuel cans should be protected from long-term UV exposure, anyway) can go a long way towards mitigating that problem...