SteriPEN Camp & Hike Prefilter Water Bottle Attachment SPPF. The Pre-Filter is designed to be stored directly on a wide mouth bottle and the SteriPEN Classic 3 or SteriPEN Ultra fit perfectly in the filter. Just insert SteriPEN in the filter opening turn the bottle upside down and gently rock to circulate light throughout bottle.
Current Retail: $12.95-$14.41
Historic Range: $7.49-$18.81