The sun can do many great things besides heat the earth and make the planet sustainable for life. It can also give great tans, but more importantly it can be used as a way to recharge our electronics on the go. And now it can also purify water.
Two developers, Ryan Lynch and Marcus Triest, have created a prototype device that could allow water to be purified in a special bag while on the go! This technology utilizes the SODIS method of water purification, whereby PET bottles can be filled with water, left in the sun so that the UV-A radiation can kill the majority of the germs and hence make it relatively safe to drink.
The downside is that you better not be particularly thirsty as the process can take about six hours to purify just three liters of water. However the developers are working on a way to purify 9.4 liters in the same amount of time.