A stopper with a small pump built into the head. Seat it in the neck of an opened bottle, work the pump, and it draws the air out from above the wine so oxidation slows and the bottle you opened on Friday is still worth pouring later.
The body is stainless steel, so it will not swell, crumble or stain the way a re-inserted cork does after a few uses, and it fits the necks of standard wine and sparkling bottles. At 1.97 inches (5 cm) it takes up no more drawer space than the cork it replaces.
Stainless steel construction, reusable
Built-in vacuum pump, no separate pump body to store
Tight seal that also suits a bottle laid down in the fridge door
