Contico Storage Locker for $25.18. Select free site-to-store for in-store pickup at Walmart to save on shipping. Otherwise, shipping is $4.97 or free on orders over $50. Here is a screenshot for reference. It features 23-gallon storage capacity with wheels and built-in handles. This lock box also meets USPS, UPS and airline regulations. Most places have this storage locker box for about $59.