This is an adaptation of TrocheHole's dual ring bottle opener, modified to open two different size bottles while maintaining the leverage of the dual ring design.

This remix came about to help someone with chronic wrist/thumb pain. I needed an extra large opener for a 40mm cap (typical on juice and sports drink bottles) and also one for Silk milk cartons which requires a very small size, then got the idea to combine the two. It took quite a few prototypes to dial the sizes in.

The included file has six plates, all of which have the 40mm XXXL as one half of the design. For the other half, the first plate has my extra extra small Silk opener while the rest correspond to the sizes TrocheHole included (Medium is 22mm and they go up or down 0.2mm from there). The medium and small work great on milk and juice cartons I have in the house, but specific caps can be a bit different from one another.

One other change I made is I reduced the height from 14 to 12mm, works fine for everything.