This seems like a good idea if you are like me and drink a large format beer over the course of a few hours. Doesn’t look like it will work with champagne or Belgian bottles.
I got a bunch of these on the cheap. It’s enough to hold a passable amount of carbonation for an extra day or two. It fits on the wider Bruery/Belgian-size crown cap openings, but it’s a bit of a stretch (literally). More carbonated beers have occasionally popped the cap off in my fridge, but it’s great for things like big barleywines when I have no one to split the bottle with.
That seems pretty nice. I wonder if it’s specific to that bottle size, or if it can fit a normal 27mm crown cap longneck and smaller 375mL champagne bottles.