Stainless Steel 20 oz tumbler lids, with a mouth diameter of 3.54 inches. Christmas Gift Improved water stop ring for spillproof design. Plastic material, BPA free, Eco-friendly, Non-toxic, sturdy and durable. Easy to use sliding button design, with one-handed operation and sip-through hole. Dishwasher safe for easy cleaning. 100% customer satisfaction with friendly customer service and support. 20 oz replacement lid for tumblers with 3.25 -inch mouth diameter. Made of BPA-free, eco-friendly, durable plastic. Sliding button design for one-handed use. Drink directly or with a straw. Dishwasher safe. Christmas Gift