tumbler with vacuum insulation and BPA free Slider Lid. Great for all kind of occasions and suitable use for all ages. tumblers are double walled and vacuum insulated, by the pool, at the office, in your car, wherever - tumbler keeps your favorite drinks icy cold or piping for hours, also combined with a splash resistant lid and you get additional thermal control. the classic and journey tumblers can be applied as wine cups, champagne cups, water cup or sports fan travel mugs, suitable for parties, picnics, self-driving travelling, boats, beach, pool, camping and hiking, etc.