Garden party season has arrived – and if you’re taking your guests outdoors for dinners, parties and just about any sunny afternoon at your place, then you may be considering if there’s a better way to keep your drinks cool. One way is to stash your drinks in a second fridge in your cellar or on your terrace, say if you are staying home to watch European Football Championship, Copa América or Olympics events with friends. But if you are using an older fridge, one downside is that it may have been decommissioned for normal operation and could potentially guzzle a lot of electricity. To prevent …