Tripour beaker holder- 100 ml

Tripour beakers are handy, but the 100 and 50 ml versions are too light (and top-heavy) to be stable even when filled. This holder holds a standard 100 ml plastic tripour steady so you don't knock it over. Open in front and back so the light shines through and you can see inside.
This version holds it snug- if you want it to be loose, scale it up by a few percent. Print in an appropriate plastic based on what solvents it may be exposed to.
There's a single-beaker size and a double-beaker size. 50 ml version coming soon, I think.
Probably only 4-5 people in the world need this, but I'm one of them, so there you go.