Proof will track your blood alcohol content with a wristband

Checking your blood alcohol content with a breathalyzer while out with some friends might just be a party trick — but if you really wanted to know it to figure out whether or not you should have another drink, it might be awkward to pull one out. So that’s why Evan Strenk started Milo Sensors, a company built around wearable sensors that detects various chemicals in your body based…