Klean Kanteen Sport Cap 3.0 for Classic bottles

The Klean Kanteen sport cap is suited for all Klean Kanteen Classic bottles. Usually when you drink from a sport cap, the bottle will form a vacuum. This isn't possible with a stainless steel drinking bottle because you cannot squeeze the bottle. For that reason the cap has been enhanced with a valve. This valve ensures that air can enter the bottle so it is easy to drink from it. Even though the sport cap 3.0 is better in comparison to the previous cap, this cap isn't 100% guaranteed leak proof. It is the result of the valve. If you want to make 100% sure that the cap is leak proof you could purchase the loop cap as an additional accessory. This cap is also available as a 100% stainless steel cap and as a [Bamboo Cap.](kato://product/ KC1000625) A flatter edition to make sure the bottle takes up even less room.