Mainstays 40 oz Stainless Steel Tumbler with Straw and Handle Double Wall Insulated Mainstays 40 Ounce double wall stainless steel tumbler will keep you hydrated all day long. With a 40-Ounce capacity, this reusable tumbler is the drinkware everyone needs in their home and office. This 40- Ounce Tumbler is made of food grade stainless steel which is firm, rustproof, no harm to human health and without metallic taste. This 40-Ounce tumbler comes with with a lid, straw and a large handle. Suitable for swimming, sports, travel, campling, parties, etc. • 18/8 Recycled Stainless steel, BPA-free • Double-wall vacuum insulation • Reusable straw