After years of bumbling along with a cool box and ice cube thingy. I bought an Audi special electric cool box with plug and car thingy. I'm emailed the campsite for electric hook up , very excited no electric hook up!!! Now this site has lodges, caravans etc just no hook up.i have thrown out my ice packs, and am worried plugging new box into the car will drain my battery...hmmmmph I am off out for new cubes.