There is a PotSak pouch for every shape and size pot. The PotSak liners line the bottom of  your pot and after you add the FILL it creates a cavity for free drainage. You don't need a saucer.  The  top layer of the PotSak pouch allows water to drain through but not your  plants roots. The wicker string (this is a little magic) and its included in the fillable pouches packs only. Single PotSak's do not include a wicker string. Singles come complete with fill ready for you to use in your pot. The water proof layer stops any leakage so you don't need a saucer or hole in your pot. Its a game changer for Indoor plant lovers.