Into each of 4 sections of ice cube tray pour 2 Tblsps soda (sections should be about two third full); freeze till cubes are solid. Wrap banana in plastic freezer wrap freeze till solid. In blender combine remaining half cup soda, frozen banana half, dairy drink mix, and peanut butter, and process at high speed till smooth, scraping down sides of container as necessary. Add soda cubes, 1 at a time, processing after each addition till ice is dissolved (mixture will be thick). Serve immediately. Makes one serving: 1 P, -20ºC a, -20ºC r, 1 M, 2 opt. cals. Variation: Omit peanut butter and lose 1P and -20ºC a NOTE: Both these recipes were adapted from "Weight Watchers Family Recipes." I say "adapted," 'cause I prefer to eat my frozen banana without a stick in it !