Four 16 oz cups in food-grade 304 stainless steel, polished inside and out. They stack into one another, so a set of four takes the shelf space of roughly one and a half glasses - which is why they end up in campervans, picnic baskets and cupboards that were already full.
Metal does not shatter in a crowded sink or on a patio, and this steel is odorless, rust resistant and BPA free, so a drink tastes the way it should. Each cup measures 12.5 x 8.9 x 6.2 cm (4.9 x 3.5 x 2.4 in); the set weighs 330 g.
