Oklahoma State wave 17 oz bottle by Simple Modern black. This tumbler by local brand Simple Modern is officially licensed by Oklahoma State University. Allows your drink to stay cold for up to 24 hours and hot for up to 12 hours! 18/8 stainless steel. The exterior won't sweat! BPA free. The shape will fit any normal sized cup holder. Durable. Annnddd like we said, locally made! Grab yours today!