Ruckus’ Carbon Access Tool is pretty nifty. I got one in the mail as I was heading out for Australia, so I didn’t get the chance to mess with it but everything about the C.A.T. was spot-on. The dudes at Ruckus have a Kickstarter for the C.A.T., so head over and check that out. Or, if you like bidons, have you seen the Joe Biden bidons?