Really Useful Box® Plastic Storage Box, 4 Liters, 14 1/2" x 10 1/4" x 3 1/4", Transparent Blue

Nice quality but isn't water tight for our project purposes. Will gladly use them for another storage purpose.

I purchased this container when putting together my own sand tray kit and overall, I am very pleased with the product. The blue container bottom is ideal for sand tray as it gives a backdrop to create the illusion of water when constructing a scene and the clear top allows view of the contents. I use paper or a piece of fabric like a handkerchief to separate items from the sand when transporting. The only thing to keep in mind is the handles are smooth and move fluidly so they may flip open if you grab the container near the handles. I carry by the long side to avoid unintentionally opening the container.