Volcano Solid Valve Bag Ring

We dropped the bag from our Storz & Bickel Volcano Solid Valve Set and broke the plastic ring that keeps the end of the bag folded up against the valve enclosure. Turns out, we don't have to figure out how to order a new one - we can just design and print one!

We made some adjustments to the original design that we think are improvements:
* The teeth grip better into the groove on the valve.
* Instead of being evenly distributed, the teeth are clustered where the groove actually is so they all fit into it.
* The ring is deeper so it holds back more of the end of the bag and provides more of a surface to hold onto.