Gathering Prototype Stacked - Inset Frame v1.1

This an inner lip that can be glued on the underside of the middle and/or lid. It is part of a larger collection of pieces: https://www.thingiverse.com/jhg03a/collections/gathered

This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/hA8VczfIjCJ