Buyers Products 1712240 Black Poly All-Purpose Storage Chest with Hasp & Stainless Steel Hinge - 6.3 cu ft Lightweight Outdoor Storage Box, Durable & Dent-Resistant, Made in USA - Perfect for Garage, Patio, Garden & Backyard Organization

I think this is what I have been looking for, a heavy duty plastic container that I can make water resistant and strong enough to deter potential thieves.Additional:Measurements: in inchesOutside:Bottom: 18.5 wide by 41.25 longTop: 19 wide by 44.5 longThe total heigth 17.0Inside: 18.0 wide by 41.0 long by 15.25 to the top of the lip.Top: double thickness and appears to have a black foam core to make it more ridge. I stood on it with my 200lbs.It is 2.25 thick at the lip and 1.0 thick inside the lip. 17.0 by 42.0 on the inside.The body is approximately 0.125 thick and presses directly on the flat inside of the lid following the shape of the tops overhang. I expect it to be water resistant to direct rainfall but as I intend to expose it to being pulled behind a motorcycle I will install a flat rubber seal where the bottom meets the top or find something better if it fails to keep the rain out.I'm going to use this as the basis of a solo-wheel motorcycle cargo trailer. It's frame will have sufficient structure to support about one hundred pounds of glamping gear when my spouse travels with me. Looks large enough to even carry a small cooler. The walls of it look to be twice the thickness of most house storage containers. Its also advertised for pickup bed storage. The lid is double wall and just needs a rubber seal to improve water resistance if exposed to the weather. I'll be finding out if I need to pack it using dry bags. I plan on repainting the black top a more reflective color to reduce its heat absorption.It was attractively priced and the shipping free. It arrived in less than a week. I should have a working trailer for my BMW R75 by the end of the summer.