These are great! instead of using a baggy you can use this to store your pieces, and the real perk is that they double as TWO trays that handily store your game pieces during game play instead of having them scattered all over the table! the lid snaps onto the tray fine, but my only complaint is that when the lid is on, you cannot snap multiple trays together. they "fit" together if you stack them but they don't snap together.