Yes, here it is; the Progress Fizz Keeper©
See it in action as another bottle of coke is rescued from certain flatness.
WARNING: Do not pump your Progress Fizz Keeper© indefinitely! This image serves only as a (pointless) representation and should no be used as directions of usage for a Progress Fizz Keeper©. Bottles are liable to explode if pumped for too long.
Update (16/12/02): We now have a dedicated Fizzkeeper fan-site!