I've seriously got 20 of these - they are my go to bottle and I never shop around for other brands. They keep my drinks cold and are big enough to carry plenty on the bike yet not so big I can't stuff one in a Jersey pocket. Why so many? I use them for sag bags on ultra distance rides where as many as 6 per stop are loaded with drink mix so all I need to do is add water, shake and roll.
Nice extra large bottle that keeps drinks chilled for a lot longer than a regular plastic water bottle. In 95 degree weather, starting with ice and water, after an hour and 30 minutes, the ice is gone, but the water is still cold. The nozzle is really nice. No need to pull open to get water flowing. Just squeeze the bottle, and water is delivered. The 21 oz. bottle is what most riders know as a 'large' water bottle.
I love that you twist the top and squeeze and it does NOT leak all over my jersey or my bike and it cleans easy! holds just the right amount and when you shake it up it does NOT drip out all over you and it keep cool for a goo while.
If you want inexpensive water bottles, and don't mind your beverages being the same temperature as the outdoors, then do NOT buy these bottles. But, if you like your cycling beverage to remain coldcool on a long bike ride when it's warm or even hot outside, then these are the go to bottles. Will they keep your water cold for hours and hours in 90F heat? Nope. But, they will keep it cool for hours and hours longer than traditional water bottles. The only downside is that cleaning them is a bit of a challenge.