This product is a stainless steel ring made to order using a 3D printer. The familiar Batman logo is designed, and there is a "hole" in the center that can be hooked on the lid of the bottle.
I came to the park for a picnic, but forgot to bring a bottle opener! It's especially useful at times, and you'll be popular with everyone. It's definitely cool to see him quickly pulling his hand out of his pocket and using a ring to open the lid of a beer or cola.
By the way, this Batman ring is available in a wide range of sizes, so it may be a good idea to pair it with a couple. How about this year's Christmas gift?
* All images are from Etsy.com