Why haven't I thought of this before? Champagne getting too warm or a friend brings over an un-chilled bottle but you don't want to ruin it with ice, bam! Juice ice cubes! I am dying to try this idea. Nothing like fresh raspberry, peach, or orange juice frozen and waiting to chill your champagne and become a mimosas at the same time. Have you ever tried this before? I think I may start keeping a tray of juice in my freezer from now on.