This a the top tray or top basket for the Oneskin 50.
These are a food grade polypropylene container, designed for commercial kitchens.
They can withstand from -40 degrees celcius to 70 degrees celcius. They can even be used to make your own block ice with as they hold water.
These sit on the lip just inside the 50 Oneskin cooler. These take up just over half the width of these coolers. However, the dividers and these trays are not able to be used together at the same time.