My favourite travel gadget by far has to be the GRAYL Water Purifier Bottle and has been a lifesaver many times. The bottle allows you to top up your water supply while on your walks by using any puddles, lakes or rivers that you may come across. With no batteries, squeezing, pumping or sucking required you can enjoy fresh clean water in a matter of minutes. Filtering out 99.99999% of all bacteria, you can feel safe knowing the water is clean from any harmful bacteria. It also saves you having to carry litres of water around with you, the one bottle can be refilled many times from various water supplies.
Contributor: Chris Singleton from dublinpublictransport