First of all, these trays are made of MDF bamboo. These types of wood are designed to be strong with a smooth and flawless finish. This is why this is an ideal material for these trays because they contribute to its sturdiness and it can carry enough weight. Caring for these trays is quite easy. Since you use is for snacking or eating it is natural to stain it with water or any form of liquids, in this case just make sure you clean it dry right away and not let the water to seep into the wood. You can use placemats and glass coasters that absorbs moisture to make sure that the moisture or water is absorbed into it instead of it settling on the tray. Another thing you have to always remember is to make sure that you clean and dry it before storing. This way it will not attract insects and molds that can eventually ruin your tray.