Repour is a smart way to keep open bottles of wine fresh. Simply remove the foil and place the stopper in an open bottle. By absorbing the oxygen from the bottle - which is what causes your wine to go bad in the first place - it will keep one bottle fresh from the first glass to the last. Unlike complex vacuum pumps and preservation cartridges, Repour uses a special cartridge to remove oxygen from the bottle, reducing it down to less than 0.5 percent. Easy to use - one stopper for one bottle. Set includes 10 stoppers.