I received the bottles recently and I think it's a shame they are not compatible with the Aarke carbonator3. I try to avoid the plastic used in food and this glass model would have been perfect, shame. Can you mention this to Aarke? Their dispensers are great in design and quality, but the PET bottles are not very nice and the quality is not great either. The metal parts came off quickly after a few uses. Not to mention the plastic which becomes dull with each use.