A classic checkerboard pattern of alternating black and white squares appears to ripple and undulate across the composition, as if the flat grid has been bent and warped by an invisible force. The optical distortion creates a hypnotic, three-dimensional effect that challenges the eye's perception of what should be rigid geometry. Built from double-wall stainless steel and made to order, holding 20 ounces with a snap-on lid, a standard-cup-holder fit, and wraparound artwork. Your commute carrying original art instead of another branded tumbler.