The SteriPEN Classic purifies water by using ultraviolet light to kill bacteria and protozoans and cysts, including giardia and cryptosporidium. No chemicals, no pumping, and does not alter the taste of water. The 40 micron pre-filter is designed to remove particulates and fits the mouth of most wide-mouth water bottles.
Specifications and Features:
6.5 to 8 ounces (depending on batteries used)
Push button auto start
Automatic dosage for 16 or 32 ounces
Uses four "AA" batteries (not included)
Water bottle pre-filter
Limited lifetime warranty