Steripen Ultra

The Ultra UV Water Purifier, by Steripen, is a lightweight and compact UV water purifier that eliminates 99.9% of bacteria, protozoa and viruses in just seconds.

Thanks to its small size and low weight (140 grams), it has been specially designed to be taken anywhere. The UV lamp has a lifespan of 8,000 uses and can treat 1 liter of water per use.

It is very simple to use — just dip the pen into your container and stir until the LED indicator stops blinking! It should only be used in clear water, as murky water loaded with sediment reduces its effectiveness.

• Its Lithium-Ion battery is rechargeable via USB.