With purchases of $25 or more, Amazon offers its Prime members the Skip Hop Zoo Reusable Sandwich and Snack Bag Set in Bee for $5.99 with free shipping. (Non-members can spend $35 to qualify for free shipping.) That's tied with our mention from two weeks ago (although that mention didn't require a minimum purchase) and the lowest price we could find in any style by $6. These zip-top bags feature a food-safe, water-resistant, and BPA-free interior.