Crystal Thick-Walled Pebble Optic Tumbler 20 Ounce -- 24 per caseAttractive pebbled exterior hides scratches. Made of dishwasher safe SAN with thick-walled construction for sturdy feel. 5 oz, 8 oz, 9-1/2 oz, and 12 oz sizes have stacking feature on bottom. BPA free. SAN is resistant to staining, breaking and chipping.