I've been finding flip-tops handy. The Ferroday store on Amazon sells flip-tops.
https://www.amazon.com/Ferroday-Swing-Bottle-Replacement-Gaskets/dp/B07FZVZR69/
I wonder about drilling into glass for udderbots without flip-tops to install these. Or simply using the metal rings provided. It might be finicky.
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I also stumbled on Pick n Pack Foam Sheets, which may make it easy to assemble an Udderbot Case. Y'know, like a "real instrument".
https://www.uline.com/Product/Detail/S-22368/Foam/Pick-and-Pack-Foam-Sheets-24-x-24-x-3
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Here’s a link to the type of canning glove I’m using. They are not super thick, just a bit thicker than regular rubber gloves. I’m not sure about the brand or size though, since I got mine at a garage sale.
