Here is an in-cooler entertainment system that chills your drinks and keeps you entertained. You can use an external battery or power from your car to use it. The PWD-CB1 Alpine ICE has a 180-watt sound system consisting of a 5.25-inch component waterproof speaker, 4×10-inch bass radiators and an audio amplifier.
The PWD-CB1 Alpine ICE lets you know when your vehicle needs to be started to stop the battery from completely discharging. It measures 34″ L x 16 3/4″ W x 17 7/8″ H. Sets you back $1500 though.