I'm with Lori and OM on this one even though I have used a Steripen for four trouble free years. Over the years I have become increasingly wary of electronic gear in the backcountry. When something electronic goes sour there is not much that can be done to fix it. Mechanical stuff, on the other hand, may possibly be repaired in the field. The Steripen, spare batteries and a wide-mouthed stirring bottle can actually weigh more than does the Sawyer Squeeze. And, the Squeeze can be used as an unattended gravity filter; the Steripen requires you to kneel on the ground and stir water one liter at a time.