Donvier Ice Cream Maker: No salt or ice are needed to create 1 quart of ice cream, frozen yogurt, sorbet, or frozen drinks at home with this ice-cream maker. Just turning the crank occasionally for 15 or 20 minutes is all it takes. The unit's freezer bowl goes into a refrigerator's freezer for about 7 hours to freeze the liquid between its walls. Not $25, but $20. New is $49.00.