Etsy has a great vintage selection, with quite a few mid-century finds. I'm especially fond of this little avian bottle opener from seller Ella Cinders. Check out her shop for more items - not everything is MCM, but this clock and desk lamp are pretty cool.
This cute would-be feathered friend is truly a "form meets functional" classic. It is the perfect shape for opening a bottle with ease and yet has an almost sculptural quality to it. Likely made of rosewood, this lovely is made in Denmark and signed.