I have a dozen of the Plano boxes, they are only $29 at Northern Tool. They are lockable, and easily can go on your cargo basket with no risk of them flying open at speed since they have 4 separate latches. They are stackable. They also have padlock access. The negative, they are cheap, the hinges are marginal at best since they are cheap molded plastic. I use them for camping, and they stay packed all the time. They are pretty waterproof as far as rain, ours were on the roof of the expy and sat outside in the rain, no problems. That is why I went back and bought the last ones at my local Northern Tool.