reservoir. bottom of fill pipe (recycled water bottle) lower right. the window box is a typical planter found in big box stores. it is too small as demonstrated by the root mass. wider and half again or twice as deep would be much better. in a slow, steady stream. beat on high until mixture has cooled to room temperature, about 5 minutes. with a rubber spatula, fold in whipped cream. transfer mixture to a 5-by-10-inch loaf pan. cover with plastic wrap. freeze until set, 2 hours (or up to 1 week). 