LifeSaver Bottle

The LifeSaver Bottle is an amazing invention that can help so many people worldwide.  There's a TED talk about it that could blow you away.  It's basically a high capacity portable water filter.  It can make people in the developing world way more productive or provide convenience for outdoorsmen in the first world.  It's scaable, reusable, and possibly the best solution to the clean water problem that is available today.