I have Multiple Sclerosis and wasn't getting enough water in my system because I'd have to go downstairs often to get ice and water. I didn't go down as often as I should because of the fatigue and pain. I have this cozy Portable Ice Maker upstairs and that alone raised my drinking of cold water. The ice cubes are empty on the inside of an otherwise solid piece of ice, which does make it work fast. I fill the little basket with ice cubes (takes a few cycles of making them) and use most of the ice in a 16 oz cup, and then use "cold" water from our tap (we have good water in this area), and I end up with some of the ice melting from the water while still leaving some ice, which makes the perfect glass of water, esp since I drink kind of slow but my main water cup is stainless steel and double walled so that lasts until I need more.
I ordered this one from here
https://houseandbeyond.org/best-ice-maker/ and it is so satisfying and an investment in your health (partially regulates blood pressure too by thinning of the blood with water.