Using the so-called "Obama cans"
Really? I suspect you're joking but please don't blame the President for something that happened before his time:
http://lfb.org/how-government-wrecked-the-gas-can/
It took one quick search. The whole trend began in (wait for it) California. Regulations began in 2000, with the idea of preventing spillage. The notion spread and was picked up by the EPA, which is always looking for new and innovative ways to spread as much human misery as possible.
An ominous regulatory announcement from the EPA came in 2007: “Starting with containers manufactured in 2009… it is expected that the new cans will be built with a simple and inexpensive permeation barrier and new spouts that close automatically.”
The government never said “no vents.” It abolished them de facto with new standards that every state had to adopt by 2009. So for the last three years, you have not been able to buy gas cans that work properly. They are not permitted to have a separate vent. The top has to close automatically. There are other silly things now, too, but the biggest problem is that they do not do well what cans are supposed to do.