Proozy offers the LifeStraw Personal Water Filter 3-Pack for $69.99. Coupon code "DN30" cuts it to $30. With free shipping, that's tied with our mention from three weeks ago as the best per-unit price we've seen. (It's also the best deal now by $25.) These award-winning, BPA-free devices enable you to safely drink contaminated water. Each filter removes almost 100% of waterborne bacteria and protozoan parasites and will filter up to 1,000 liters of water. Deal ends July 17.