Allied® Suction Canister 1500 mL Snap-On Lid (344588_CS) 48/CSAccurate easy to read calibrations and an enlarged area in which to write patient information The snap on lid is easy to attach to the canister and virtually impossible to remove. Audible snap gives clear confirmation that the lid is properly sealed and secure. Hydrophobic filter self sealing material improves flow 20%. When the filter comes into contact with moisture, it immediately stops flow from the patient and prevents fluids from entering the