Penrose Triangle Mug

The Penrose triangle shouldn't exist, also known as the Penrose tribar it is a triangular impossible shape created by Swedish artist Oscar Reutersvärd in 1934. This optical illusion is a great example of how limited dimensions can create some crazy impossible geometric shapes, making the perfect gift for any mathematician with a soft spot for geometry.

Whether you're drinking your morning coffee, your evening tea, or something in between – this mug's for you! It's sturdy and glossy with a vivid print that'll withstand the microwave and dishwasher.

• 11 oz
• Ceramic
• Dishwasher and microwave safe
• White and glossy