The Side Pieces Are Cut from 1/4" Nominal Plywood.
The Top and Bottom of Each Section are cut either from 1/2" plywood, or 1/2" plain wood.
The holes in the top of each section need to be fitted to your size tumbler. The InkPixi Glasses come out at 3" in the center.
Here is a link to the Glasses used.
https://www.inkpixi.com/items/american-original/clear/pint-glass-engraved-(single).
The sides are screwed in with 1/2" wood screws at each corner, and I used Acorn Nuts and Carriage Bolts – 1/4-20 in Stainless backed by 1/4" washers fora finished look.
Martin Gutzmer