After years of teachers telling you that math is supposedly ‘cool’ and ‘useful’, the Klein glass bottle proves they actually were right all along. It’s an intriguing ornament, modeled after the actual Klein bottle, which is a figure that plays with our perception to the point where notions of the top and bottom become distorted.

Whatever angle you look at it, the Klein glass bottle makes a great addition to your home. It’s functional enough to where you can actually use it on a day to day basis yet elegant enough to be passed off as an uber-expensive designer vase. The Klein bottles are available in various sizes and are molded by skilled artisans out of quality glass to produce the most mind-boggling effects possible. Unlike an actual Klein figure, these bottles are equipped with a concealed opening at the bottom so you can actually fill it up with the liquid of your choice and baffle all visitors that step into your home.