Trick Mugs Black Friday Deals
Crooked Straight Lines Optical Illusion Mug
Crooked Straight Lines Optical Illusion Mug

Crooked Straight Lines Optical Illusion Mug

Regular price $17.99 $13.50 Sale

Are the lines crooked? Are the lines straight? No-one knows! Help solve the mystery by picking up your Crooked Straight Lines Optical Illusion Coffee Mug.

· Available in 11 oz size
· Microwave safe
· Machine washable

· Heat activated, color changing mug (optional)
· Starts out black and changes color in 15-30 seconds when a hot beverage is added (optional)



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