Tumbler Adapter

I designed this adapter/holder to be used with a laser engraver and three-jaw chuck. It is meant to hold onto the internal lip of the tumbler with the chuck to allow larger tumblers to be engraved with a rotary device. I designed it around the Yeti brand wide mouth tumblers but it should fit most other brands of tumblers with an internal diameter of approx 3.75in. or 95mm. I printed mine from PLA with 3 walls and relatively low infill. It should be rigid enough to not break but flexible enough to bend when the chuck is tightened. PETG or ASA/ABS might be a more durable filament for long-term use.