Only genuine iSi Cream Chargers can provide the quality and taste that discriminating consumers want. Since they are made exclusively for our cream whippers, our charges are perfectly designed and filled . . . and theyÃre backed by 100% quality control testing. To be sure you serve the very best, buy only the very best. Cream chargers made by iSi. Features:Ã¯ Use one per half-pint or pint size bottle fill. Ã¯ Leak proof. Ã¯ Has no expiration date. Ã¯ Made of 100% recyclable steel.