The ring fits snugly around the top and bottom of the filter. Just slip it on, then slip it off to clean it.
The Sealing Power of the Brew Tube
The ring creates a leak-proof, airtight seal between the jar, the Brew Tube, and the filter. If you're not moving / shaking / jogging / rollercoastering with the jar full of liquid, you may not need the ring. However, if you want to take it camping, shake it up, take it dancing on Saturday night, or just don't want any oxygen getting to your coffee - this is for you. We really do like you that much.
Of course not. It's there for you, just in case.
Yep! You're experiencing, first-hand, the airtight seal that this little thing creates. Just push down a little bit harder while you're turning the lid.
Give it to a friend, along with a Brew Tube, so they can have an extra sealing ring. Or use it as a bracelet. Or a really small frisbee.
That's ok. Feel free to hang out as long as you'd like. We'll just awkwardly stare at you through your webcam. (That's a joke.)