I'm almost never without a large insulated glass of water with lots of ice. The insulated glasses don't sweat and they keep the ice from melting much longer.
I have a well and discovered some water issues several years back, so I started buying bottled (gallons) of water and would keep about a dozen on hand at all times that I used for drinking, ice and cooking.
I started selling limeades at a Farmer's Market last year and started using the 'refill water machines' at my local supermarket. Filtered, ionized, ultraviolet, osmosis, etc. Whatever they do to it, it's great.
The water that I had been buying in gallons was nothing but a jug filled from a city's municipal water supply. After having the good stuff, I couldn't even finish what I had left on the shelf.
The ice I use for limeades came from Sam's Club and I checked with the ice manufacturer and they use the same water filtering process for their ice. I now use that ice exclusively.
About 25 years ago I was listening to a radio show when they were making the transition from saccharin to the other artificial sweetener in diet drinks and he was talking about what we will discover about the ill effects of it 10-15 years down the road. I couldn't tell you what he said, but it convinced me that it was a problem and I quit soft drinks cold turkey right then. I've had maybe 3 glasses of a soft drink in the past 25 years.
In restaurants I usually take a slice of lemon in my ice water because you never know if the water is 'good' or not. The lemon will help cover up the tap water taste.
I used to be a big ice cruncher and my dentist told me for years about how bad it was for your teeth. They're finally in bad enough shape that I've had to stop crunching ice. I still try to get my 'fix' by sucking on ice.
BTW, the issue with crunching ice is not just the 'hardness' but the fact that the cold makes your teeth brittle and subject to cracking.