Tired of ice cubes? Don't want to wait for the melting and are irritated by the ones that refuse to melt? Can't carry them around? No problem.
1. Get a half-full bottle of water.
2. Place it HORIZONTALLY in the freezer.
3. Allow total freezing - for best results leave overnight.
1. Take the bottle out of the freezer.
2. Pound it against something hard or squeeze until ice breaks off the wall of the bottle.
3. Pour the desired drink into the bottle; allow sitting for about 30 secs.
4. Pour the drink back into the original container.
5. If not cold enough, repeat steps 3-4.
Extra tip: The bigger the ice bottle, the longer until ice melts. At a certain point in melting you may want to use it to cool water only.
It works for the same reason the icebergs withstood milennia without melting: massive volume, small surface area. In 1000/1000 cases you will confirm that smaller ice cubes melt faster than larger ones. But why? Here, we bypass physics and appeal to basic knowledge and some geometry:
Here's an ice cube:
Here's an ice cube split in two:
It's the same mass and same volume. So what's changed? The surface area. Now, unlike with one full cube, we have the additional internal surface area. Since the ice cube is suspended in fluids, this means that more of the ice cube is being exposed to interacting with its medium at a time - thus increasing the speed of any reactions, and thus, cooling things faster (and melting faster). When the ice cube was whole, the internal region was not interacting with the medium because it was "sealed" inside the cube.
In other words, if you want the fastest cooling, crush your ice. If you want a source of cooling that lasts the longest, make it as large and whole as possible by minimizing surface area and maximizing volume (so a sphere is ideal - but a bottle will do too).
And note that this works for any other item-medium interaction; agar cubes in biology experiments react with chemicals faster if they're smaller, etc. Isn't it great we can explain so much physics without physics - just basic geometry?
Here's some unnecessary experimental data, just for perspective: