ReDub the Bub

As celebration season approaches, you're bound to have some leftover sparkling something-or-other. Heed this tip from Real Simple Magazine (via CupOfJo) :

Drop a raisin into a bottle of flattening champagne (or prosecco, or whatever). Any smidge of carbon dioxide left in the liquid will glom on to the wrinkly raisin and then release in the form of tiny bubbles.

Presto! Reinvigorated bubbly.