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.
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.
Use biking and mostly take long rides- metric centuries. Keeps liquid relatively cold for the entire ride. Design of bottle is perfect for easy cleaning without numerous lid ridges that are difficult to get clean.