Premade Grids are similar to the bases but dont have connectors and are a single Piece.
They can hold the following container Sizes:
Grid 1 - 1 Large,1 Wide,1 Medium, 2 Small. (Pictured).
Grid 2 - 2 Medium, 4 Small.
Grid 3 - 8 Small
Grid 4 - 6 Small
Grid 5 - 4 Small