Portable Plastic Storage Box Design

I need a compact plastic storage box that keeps small items tidy, easy to grab on the go, and fully protected from water. The vision is a lightweight case molded in durable plastic, fitted with a magnetic closure that snaps shut cleanly without fiddly latches... (Budget: ₹600 - ₹1500 INR, Jobs: 3D CAD, 3D Design, 3D Modelling, AutoCAD, CAD/CAM, Fusion 360, Product Design, Solidworks)