After 30 years I had to replace my fuel bottle. I bought a Stansport because that was all that was available. The white gas in the bottle caused the cap to swell and it was hard to get back on after removing it. If you let the bottle dry out, it fit again. I bought an Optimus bottle and it's of much higher quality and I have no problems at all with the stopper. DON'T BUY STANSPORT, NO MATTER
This review was written in the old system and had content requirements that are different than reviews written today.