Two years ago, my now-husband proposed to me using a treasure chest cube that only revealed the ring once solved! Rubik's cubes also featured heavily at the wedding earlier this year :
Oskar's Treasure Chest Unboxing - YouTube
Oskar's Treasure Chest — Boxes and Booze
Cubelelo YuXin Treasure Box 3x3 Stickerless Puzzle toy speed cube - YuXin Treasure Box 3x3 Stickerless Puzzle toy speed cube . shop for Cubelelo products in India. | Flipkart.com
Smart School House - DIY Rubik's cube chest of drawers. Neat! Tutorial here: http://www.instructables.com/id/Rubiks-cube-chest-of-drawers/ | Facebook
YuXin Treasure Chest 3x3x3 Magic Cube Stickerless_3x3x3_Cubezz.com: Professional Puzzle Store for Magic Cubes, Rubik's Cubes, Magic Cube Accessories & Other Puzzles - Powered by Cubezz
Oskar's Treasure Chest - Black Body | 3x3 | Puzzle Master Inc
YuXin Treasure Chest 2x2 3x3 – SpeedyCubes
Acheter Mefferts Oskar Treasure Chest - kubekings.fr