I am tired of water bottles breaking after 1-2 years or becoming moldy all over and impossible to clean it off. (I live in the UK and mold is such a common and annoying problem). I see the kleen kanteen recommended, people say they even used theirs for 12 or even 20 years! Impressive. Is this the case for all of their models? I am specifically interested in the twist straw bottle. Any of you use one and find it durable? I need some personal experiences before I invest so much money on a bottle. #lifestyle