Vacuum InsulationCOKTIK insulated stainless steel water bottle has carefully chosen doublewalled vacuum insulation technology Drink will be kept warm for 12 hours and kept cold for 24 hours Doubled walled function resists condensation on its outer layer MaterialOur water bottles are made out of highquality 188 stainless steel and are no BPA or any other toxinsAnd the powder coat exterior finish is a classic Includes 2 LidsThe drinking bottle is equipped with two individual lidsstraw lid spout lid Carabiner Straw Lid with 2 Straws there is a hook on the spout lid that can be hung on bags for easy portability All lids are no BPA leakproof and dustproof catering to your needs Leak proofwe have determined that the bottle is absolutely leakproof and shatterproof The travel water bottles can be safely placed on a backpack or beach bagIt is great for hiking biking boating gym work and school and home List of Items Included in ProductCOKTIK Insulated Water Bottle 2 lids straw lid and spout lid 2 straws 1 cup brush Professional customer service