Double Y 16 OZ Double Walled Vacuum Flask Thermo 18/8 Stainless Steel Insulated Water Bottle (Yellow) VACUUM INSULATED - The Double Y insulated water bottle is a double walled vacuum thermos, keeping drinks cold for up to 12 hours. This bottle will never sweat. PREMIUM 18/8 STAINLESS STEEL - These bottles are made from the highest quality materials of 18/8 Stainless steel, making them durable and functional. EASY TO CARRY ON THE GO - Spill proof lid keeps your drink safely inside, and the leak proof bottle shape allows the bottle to easily fit into your cup holder! Plus, the double walls prevent condensation, so your fingers stay dry. Making this stainless steel water bottle thermos a must have accessory for the gym, work, car, hiking, camping, outdoors, yoga, crossfit, tennis, the beach, picnic, and travel. CUSTOMER SATISFACTION GUARANTEE: We are committed to provided the best quality products. If you aren't thrilled with your purchase, we aren't either. Try it today; you will be 100% satisfied, FLIP-OPEN LID:Flip-Open lid with safetly lock prevents the lid from opening accidentally