These bottles are the best...way better than Polar Bottles because the lid doesn't leak. In my opinion, they're also superior to the regular Podium bottle in the insulation value, and their ease of use. I find the regular Podium bottles to be too hard to squeeze. The Podium Chill is softer and easier to drink out of. For some reason, it seems like the softer plastic of the Podium Chill also provides a better seal at the cap than does the harder plastic of the standard podium.