Woot offers the EarthEasy LifeStraw Family 1.0 Water Filter for $29.99 plus $5 for shipping. That's $7 under our March mention, the best deal now by $25, and the lowest price we've seen. It filters and purifies up to 18,000 liters of water, enough to supply clean drinking water for a family of five for up to three years. Deal ends June 30.