16oz Narrow Mouth Bottle

The 16 oz size is great. It's big enough to hold a decent amount of fluid, but small enough to be practical. I personally have no trouble fitting ice cubes through the mouth, which is very comfortable to drink from. Cleaning is harder than with a wide mouth, but if you don't gunk it up all you need to do is shake it with soapy water inside.

I do a lot of hot desert climbing. So I need to put ice in my water bottle. You just can't fit any ice into this bottle.

Narrow mouth has pros and cons--hard to prepare drinks in, but easy to drink out of while on the move/in the car.

Narrow mouth hard to clean, overpriced, should not even be on a climbing site.

This is the best small water bottle I own. Never leaks. Small enough to carry on a harness. Absolutely love mine.