The description sounded great but I disliked this bottle when I struggled to get the water flowing. The water flow is very poor compared to standard bottles. The thermal cooling only lasts about 30 minutes in normal Southern California weather conditions. Not recommended.
These bottles keep cold drinks cold for up to two hours on 80F-100F days if filled with lots of ice. Cooling drops off after that point, but not as much as with other insulated bottles I've used. The nozzle is very secure, too. You can leave it up for quick squirts or sips without leaking drinks all over your bike. I plan to buy more of these before next summer.
Used these in extremely hot conditions, seem to keep ice for several hours. Being able to remove the bite valve and be dishwasher safe is a plus! Definetely a go to bottle for road and gravel riding.
These Polar Breakaway bottles are essentially the same insulated bottles in Polar's regular line but these don't have a hook and instead come with the Surge Cap, so nothing in particular makes these a cycling bottle. For the price these are actually a good price especially for insulated bottles but it should be noted that the insulation is basically the stuff you find in reflective emergency blankets but with cool designs on them, so they do insulate better than a regular bottles but in truly hot weather they don't maintain cold well.