Gadgets that are practical and cheap come by pretty rarely, and the FizzKeeper is definitely one that ought to be made a staple in every home. Everyone has experienced the pressure of finishing a calorie-laden 2 litre bottle of soda lest it gets flat. The FizzKeeper makes that situation a non-issue by replacing the bottle's cap. Just pump the ball located at the top of the FizzKeeper and plonk it back into your fridge to enjoy a fizzy drink later. Pick one up today for a mere $4.