Someone shared this on fb, and I thought it was a pretty cool system to keep beer in a growler fresh, so throwing a link in here. Dude is using kickstarter to raise funds to get this going, but has stalled out about halfway to his goal of $30k with 5 days left. If you don't like stale growler beer and have a few bones to throw his way...
http://www.kickstarter.com/projects/1691296505/the-growler-savertm-the-last-pour-is-as-good-as-th



