Health: Bottomed with gap-less welding process,it is easy to clean.it can be filled with hot water,milk,juice and cola etc. and also can maintain the original tase and nutriton. Safe: Sealed with the cork as a whole design,it will not be lose. Leak-Proof: Precise cork mold,extended-style thread,with non-cracking bottles,our bottles will be leak-proof; with unique deisgn of grooves in both sides of lid,if the bottle is filled with carbonick drink,it will release the pressure when unscrewing it. Lid: If the bottle is leaked because of the long-time use of the lid,we will provide you another free lid without purchasing certificate. Botte body can be completely recycled,healthy and environmantal.