These small kits each include 1 - 2 oz. bottle of the WP and 1 - 2 oz. bottle citric acid liquid (activator). 1000 protocol formula.
These Travel kits of the Water Purification drops are priced at $17 (see single pricing) each or special order 3 packs for $40.00.

Give them as gifts. Take the kit on trips and be safe. These bottles pass through the TSA checkin at airports because they are only 2 oz..

Purify your drinking water while travelling to foreign...

WP kills water parasites. Chlorine dioxide has been used as a water purifier for 60+ years.