Rolled lip – Easier to carry and less damage to the plant during transportation.
Fluted bottom– Makes a stronger bottom for stacking.
Extra drain holes– Better drainage – no standing water.
Bottom drain holes – More attractive look and reduces weed growth better than side holes.
Strong container lip – Easier to work with when filling container. Better for stacking plants for shipment. Allows for the use of potting dispensers, and for the use of automated equipment in moving plants around the nursery.