I love this little sprouter! Trays do not have a mesh bottom, rather they have drip holes just at the outside edge of the upward slanted trays so that there is no need for pre-soaking small seeds. The unique design uses water surface tension to keep the correct amount of water in the tray for all stages of the growing process. Just pour 2 cups of water in the top tray and the water circulates through all trays collecting in the bottom container. Includes a package of organic alfalfa sprouting seeds to get you started. Buy more sprouting seeds here. Instruction manual included. Can add 4 additional trays to make a stack of 8 growing trays, if desired. Sturdy, crack resistant, BPA-free plastic, stands 8" high.