GO2 | POD - Portable Oxygen Device
So you're curious about oxygen bars, but don't want to go full out and buy an at home kit, and there are none to visit where you live. The POD by GO2 is a portable source of canned, 95% oxygen. You get 2 liters worth (about 40 breathes) and it only weighs 2.5 ounces. Just twist the top, bring to your lips and breathe. I can say that while that I've only breathed extra oxygen (in a scuba tank) while diving, it is true that it can make you feel (slightly) more alert, warmer, and just generally fuzzy inside.