Capacity depends on canister count, cane configuration, and straw format. A typical 20L vessel holds 4 to 6 canisters. Each canister holds 5 canes. Each cane typically holds 10 to 15 standard 0.5ml straws. At maximum configuration, a single 20L dewar can accommodate 300 to 450 straws. For a fertility clinic averaging 20 to 30 patient samples per week at 5 straws per patient, a 20L dewar represents 2 to 3 weeks of intake capacity before a rotation protocol is needed. Cryolab technical team can help map storage requirements against vessel selection for any workflow volume.