These durable matte stainless steel cups are great for serving chilled water, beer and more.Our unbreakable childproof cups are made of 18/8-gauge high-quality brushed stainless steel. The water tumblers feature a rolled rim for added durability. These heavy-duty metal cups won't show unsightly fingerprints.Our steel cups are nesting for conserving cabinet storage space and for conveniently transporting it in lunch bags and picnic baskets. Stainless steel is free of BPA and harmful toxins.