These have been around since I last used WINE in anger on macOS. Basically think of it as a container for running an app in WINE with all the settings predefined for best compatibility. The homepage doesn’t really highlight this but you can look through the docs for more information.
If you've heard of Lutris, Bottles is essentially the same thing, but aimed at general software instead of only focusing on games
It's been a long time since I used wine (or any windows software really... Yay!) but I'm sure the requirement will pop up again sooner or later.
Should I check out bottles the next time it comes up?
For example, "Bottles is a wrapper around WINE"
There's nothing groundbreaking about it, but it's a straightforward way to run apps with Wine with an intuitive and pretty interface.
(They're currently working on a 2.0 release, though that's probably gonna take a while.)
It tells you right at the start:
"Easily run Windows software on Linux with Bottles!"
That's all you need to know. If Linux wants to be more mainstream it needs to drop the "Bottles is a wrapper around WINE". What's a wrapper? What's WINE? It doesn't matter. All the user need to know that you can easily run Windows software on Linux with Bottles