WISWIS 12 Pack of Heart Shape Colour Changing Rocks Water LED Glow Light up Liquid Sensor Lights Submersible Decorative for Party Wedding Club Bar Champagne Tower Decoration Made of Food grade plastic and Filled with non-toxic freezable gel Illuminate automatically when placed in cold liquid Water proof to be able to put in any drinks; Flashes or stays lit Size(mm): Approx 28(L) x 28(W) x 25(H) Used for weddings, babyshowers, birthdays parties, any other events!