Worried that Uncle John might be hitting the Night Train a little too hard this holiday season? Well, now you can keep a closer eye on him, and avoid that lawsuit when he crashes into that parked cop car.

Sure, breathalyzer technology has been around for years. So have portable versions. This however, is the first portable breathalyzer that uses a fuel cell. See, the problem is that most breathalyzers use semiconductors to test for blood alcohol levels, however they are subject to false readings and have a short usage life.

The Lifeguard Breathalyzer is available online, for $299.95. Odds are you won’t have one before Thanksgiving, but maybe you can get one before the end of the December.