"impossible" Rubik's Cube in a Bottle / Jar: This isn't much of an instructable, but I will teach you how to get a Rubik's Cube stuck into a Glass jar. There are 3. This will be quite some project with multiple ways of using the signed cube in jar finish. We had not planned on releasing details of this just yet. Rubik's Cube 3D (x) Java Game, download to your mobile for free.