Question: A long long time ago (.. I can still remember ♫) there were these old bottle caps. My parents still have 2 or 3 at home from soviet times. They look kinda like this:

[![enter image description here](https://i.stack.imgur.com/kv6MK.jpg)](https://i.stack.imgur.com/kv6MK.jpg)

What are those called? Ar there some keywords to find them? It took me at least 3- minutes to even find this image (and it was in middle of completely unrelated images down on something like the third image-search page). Or, the best option, where can I buy a box of these?

**P.S.** I know that the image is from "flip-top" wikipedia page, but what I am looking for is a cap, that is independent from the bottle itself.

Answer: 
Found what I was looking for: [WESTMARK 3 Flaschenverschlüsse, Flaschenstöpsel mit Hebel und Gummidichtung, 40 x 60 x 15 mm, farblich sortiert](https://www.danto.de/Wohnen-Einrichten/Barmoebel-accessoires/Flaschenhalter/WESTMARK-3-Flaschenverschluesse-Flaschenstoepsel-mit-Hebel-und-Gummidichtung-40-x-60-x-15-mm-farblich-sortiert.html). 

[![Westmark 3](https://i.stack.imgur.com/fgYni.jpg)](https://i.stack.imgur.com/fgYni.jpg) 

Now I only need to order a box of these.
In the USA you can find this type of cap at most homebrew shops. These originated in Holland but now are popular for many breweries around the world. Here are the [caps](https://www.morebeer.com/products/flip-top-swing-cap.html)