Drain cherries and discard juice. With a paring knife, slit each cherry from the bottom to butterfly them. Place cherries in whipped cream dispenser. Charge with two C02 soda chargers, give it a light shake and then let sit refrigerated overnight. When you are ready to serve cherries, release the CO2 by squeezing the handle. It is very important that all the gas is released! Then unscrew the top and remove cherries to a container with a tight-fitting lid. Cherries will stay fizzy for about 15 to 25 minutes. Yum!