We first approached designing the Marco tray with a simple plan, find a pool shape that told a story, and also worked well as an accessory tray. Once we found the right shape, we could make a metal tray and make it just the right shade of blue to put a little Summer nostalgia in your home. The Kidney pool was perfect. It's a lovely organic shape for swimming and for storing a wallet, keys or whatever. It's an iconic shape full of nostalgia. The edge beautifully oscillates around from a tight S curve to a long lazy arc.