Bottle coolers are useful for many things, mostly outside of the home where a fridge is not able to be accessed. Bottle coolers can be ice chests to fit many bottles, cans, beers, drinks, etc. They can be single for use when you drink them, so you can lose the ice.
I find bottle coolers come in sizes and shapes for cans, 24-oz, beer, water bottles, etc.
Great for sporting events and outdoor stuff such as sports and running, walking in the park, bird watching, canoeing, cloud watching, star gazing, moonlighting, cow tipping, throwing rocks at incoming traffic.
Bottle Coolers work by retaining heat (the cold) on the inside from the heat (not so cold) on the outside. How this works is all in the materiel used to make them. It does not let heat (hot or cold) pass through it as easy as say, a tin can, plastic, glass, tin foil, or cotton.
Other methods involve a vacuum. They take two layers and separate it by a vacuum of nothing, like space, just imagine how hard it is for anything to travel through nothing instead of a solid? These are more effective at keeping things hot or cold, soda, coffee, beer, urine, water, hot chocolate, you name it!
Ice Chests are used to keep multiple drinks
If you read all this I’m really sorry. Na, not really!