This was not a good buy for me. 3 days into my four month trip the bottle stopped working properly, meaning that water came out at the top and the bottom joint. Luckily I had brought other methods of purification with me. 2 other friends also bought the aquapure traveller and also had similar problems, albeit 4 months later rather than 3 days, when their bottles also started to leak. You would be better off buying £30 of water purification tablets than this, another friend had a similar bottle from a different brand which worked far better (Travel tap).