A thread below mentioned gas cans sucking so here's the no **** fix. A vent!
https://www.ebay.com/itm/5-Yellow-Fuel-Gas-Can-Jug-Vent-Cap-Blitz-Wedco-Scepter-Essence-Midwest-Eagle-/281247465570
While I used a 1/2" bit on the ones I bought a few years ago these call for a 31/64" a real oddball but...
https://www.ebay.com/p/1728358316
Fix some cans for your conservative neighbors or friends and be the coolest dude around. Don't tell any libs about this, they'll pee pee their pantaloons