Medi-Vac® CRD™ Suction Canister Liner 3000 mL Sealing Lid (268626_CS) 50/CSCRD disposable liners are easily assembled by snapping the lid onto the liner. Engineered for clinician safety, CRD lids contain integrated filters and shut off valves. The lids lock into place after assembly in order to minimize the risk of spillage during the transport process. CRD disposable liners require the use of a reusable outer canister. This 3000 mL suction canister liner does not include tubing.