The CryoStork range covers a deliberately wide range of sizes, and the naming convention – V2 through to V10 – reflects the internal capacity in litres. But choosing the right vessel is not simply a matter of picking the largest one that fits your budget. Size affects weight, portability, hold time and practical usability in ways that matter in real clinical settings.
CryoStork V2 and V3
The V2 and V3 are the compact end of the CryoStork range. The V3 is one of the most widely used dry shippers in UK fertility clinics, and its popularity reflects a practical sweet spot: light enough to be carried comfortably by a single person, small enough to manage in a courier vehicle or aircraft cabin, and large enough to accommodate the sample loads typical of single-clinic or small multi-patient transfers.
For a private fertility clinic running weekly embryo or gamete transfers between two sites, or receiving regular donor sperm deliveries, the V3 is typically the right specification.
CryoStork V10
The V10 is designed for higher volume applications. Sperm banks, larger NHS fertility departments managing multi-patient batch transfers, and research institutions moving larger sample cohorts between sites all benefit from the greater carrying capacity the V10 provides. The increased size also typically means longer hold times per charge, giving a larger safety margin for longer or more complex journeys. The practical consideration is weight – it is not a vessel that one person typically carries alone.
Hold Time as a Selection Criterion
For all CryoStork models, the hold time after correct charging significantly exceeds the duration of any domestic UK transfer. The choice between models for most domestic applications comes down to sample volume, not hold time. For international transfers with potential transit delays, a larger vessel’s extended hold time becomes more relevant. For advice on the right model for your specific transfer routes, contact the Cryolab team or use CryoGPT.
