It is not often that you can point to something produced by a major pharmaceutical company and say "that is a really good piece of design", but I would suggest this is one of those.

A really simple idea to address a really huge problem. Aesthetics don't really come into this discussion. The beauty of the LifeStraw is that it works in the way that people need it to work, and it doesn't complicate a process that should be as simple as possible.