Meet the Bottlelight: a water purifier and a camping light in one. If you go camping often, you know the importance of having both of those tools. Thanks to Bottlelight, you save space and get to carry both of them at the same time. Just fill it with water, close the bottlelight, and you are ready to get rid of 99.9% of bacteria and viruses. It has a waterproof USB port for charging and a carabiner clasp, so you can attach it to your things.
The Bottlelight has shatterproof glass on the inside and a plastic layer on the outside. It produces light for up to 10 hours. An interesting idea by Christoph Kuppert.