Bemis Manufacturing Company, a leader in toilet seat manufacturing and Injection Molding. Manufacturing products inculding Toilet Seats, Health Care Canistors, Liners and the Quick-Drain system, Gas Caps and Fluid Management Systems.Bemis Manufacturing Company, a leader in toilet seat manufacturing and Injection Molding. Manufacturing products inculding Toilet Seats, Health Care Canistors, Liners and the Quick-Drain system, Gas Caps and Fluid Management Systems.