The material used in the Sigg Traveller bottle is durable and solidthe difference compared to cheap bottles is very noticeable. Siggs classic aluminum bottle is a trusted favorite among many hikers, the only one people dare to take into their sleeping bag overnight without fear of leaks. Even in tough situations, a Sigg bottle usually only gets a dent, at most. The Sigg Traveller bottle is suitable for water, carbonated and acidic drinks, citrus products, dairy products, etc. The Traveller bottles standard cap has a hole through which you can carry the bottle with a finger, a carabiner, or your own setup. There are also alternatives to the standard capcheck out our full Sigg selection! - Very tight and reliable cap - Interior has a multilayer EcoCare coating that prevents aluminum from leaching into the drinksuitable even for acidic beverages - EcoCare is completely odorless and tasteless - The EcoCare coating is flexible, so if the bottle gets a dent, it adapts to the ne