How do you thank your beta readers?

I’m looking for some thoughtful and creative ways to thank my beta readers. If you’ve worked with beta readers before, how do you like to thank them?

I’m looking for ideas! Whether it's a gift, a shout out, or something more personal, I’d love to know what you’ve done (or appreciated getting as beta reader).

Also, how do you handle the readers that meant well but didn’t finish the book? Do you thank them the same way?

Thanks in advance.