So, at church today I saw this communion cup left in the pew rack. It must have been overlooked the last time we had communion.
So I brought it home to measure, wash and return. And since I have a portable kit with similar glasses, I’ll measure those and see if they are a standard size.
Calipers out (don’t you have church calipers?) I see it is
- 36.7 mm diameter at the rim
- 26 mm in diameter at the base
- 47.1 mm tall
On the scales, I see it weighs 22g empty, and can hold about 10ml to the rim. But that’s an impractical amount for a service; 6ml is about right.
But then on sight, I could see the glasses in the portable case and the church set are different. The glasses in the portable set are
- 39.8 mm diameter at the rim
- 25.2 mm diameter at the base
- 37.5 mm tall
It weighs 16g empty, holds about 7ml to the rim, and should be filled with 4 or 5 ml. A smaller, squatter glass makes sense for a portable kit, to be fair.
But why measure? Threes reasons come to mind: finding matching replacement glasses, details for making communion trays (in the wood shop, or perhaps today 3D printed) and to buy and carry the right amount of wine or juice.