Another idea I’ve used while on vacation. Get a plastic bottle, fill it maybe 1/4 to 1/2 with water, freeze it, then before leaving turn it upside down. If the

Another idea I’ve used while on vacation. Get a plastic bottle, fill it maybe 1/4 to 1/2 with water, freeze it, then before leaving turn it upside down. If the ice stays at the bottom of the bottle when you get back you should be all good.