For testing, the room temp will be 75 degrees F, the drinks will start off at 40 degrees F, five degrees cooler than the Beverage Chiller says it can hold a temperature. I will be testing the temperature at one and two hour intervals. One drink will be sitting on my desk, the other will be chilled by the CoolIT Systems USB Beverage Chiller. The beverage of choice will be tonic water because I could not bring myself to waste a perfectly good beer.