such a shame! I own both types of Chilly bottles, the original and the series 2. After being really satisfied with the actual function of the bottle to keep fluids warm or cold I decided to buy myself a bottle from the series 2 as I prefered the new design and I wanted to profit from more drinking comfort. However once using the bottle I was a bit disappointed. The new added collar, which promises more drinking comfort as you lips dont touch the metal, but the nicely shaped collar, cannot be properly attached to the bottle. It attaches by srewing/turning the collar onto the bottle, so basically the exact same movement as you do when you open and close the bottle by screwing/ turning the lid. So each time you open the lid of the bottle, the drinking collar always follows, which destroys the entire function of this bottle. I am forced to screw off the lid and after that screw off the collar drom the lid and replace it on the bottle each time I want to drink. To me, this is not 100% thought- through design. It looks nice, but it really isnt practical at all.