Knowledge / Cost and environmental impact
Single-Use or Reusable: Which Shipping Approach Fits?
Reuse requires the packaging to return, be inspected and be prepared in time for the next shipment. Single-use packaging may be simpler with many one-off recipients or difficult return routes. Alongside thermal evidence, the comparison requires the return rate, time until the next use and refurbishment effort.
Practical guidance
Calculate how many uses to expect at your return rate and how many shippers you will need.
Open insulated transport case. Before reuse, the components are inspected and prepared according to the prescribed procedure.
Closing paper-based thermal packaging after loading.
In this guide
- When single-use packaging simplifies the process
- What must be agreed before starting a reuse process
- Returned does not yet mean ready to ship
- Worked example: how return rate affects the number of uses
- Worked example: how many shippers are tied up at once?
- Define reuse for each component
- Trial the return loop with your own shipments first
When single-use packaging simplifies the process
Changing recipients, irregular shipments or long return routes can favour single-use packaging. The recipient does not need to collect and return containers, but does need clear instructions for separating materials and disposal.
Single use says nothing about thermal suitability. High-value pharmaceutical products can also be shipped in suitable prequalified single-use packaging. The demonstrated conditions of the specific configuration are decisive.
What must be agreed before starting a reuse process
- Who collects the packaging at the recipient’s site and arranges return transport?
- Where are returns received, inspected, cleaned and dried?
- Which parts may be reused, and which are replaced?
- How is the status of systems in transit, on hold or ready for use recorded?
- How many additional units are required during returns and refurbishment?
These tasks incur costs. The worked TCO calculation shows how they enter the comparison per shipment.
Returned does not yet mean ready to ship
Keep separate stock records for systems ready for use, in transit, returned and on hold. A returned system may be counted as available only after the required inspection and preparation.
Also record losses and retired parts. The environmental assessment needs the same usage data, supplemented by materials, energy and transport routes.
Worked example: how return rate affects the number of uses
Simplified model using assumed figures: a new shipper may complete no more than 20 uses. After each use, the probability of return and release for another use is 90%. The expected average is then 1 + 0.9 + 0.9² + … + 0.9¹⁹ ≈ 8.8 uses. At 95%, it would be about 12.8.
These figures are not THERMOCON service lives or measured return rates. The model assumes the same independent probability of return and renewed release in every cycle. It shows why 20 technically possible uses do not automatically mean 20 actual uses.
Measure return and renewed release separately. This identifies whether systems remain with recipients or return but can no longer be used.
Worked example: how many shippers are tied up at once?
With a steady shipping volume, circulating stock can initially be estimated as shipments per day × average time until ready to ship again. At an assumed 100 shipments daily and seven days, this gives 700 systems. Reserve stock and rejects are additional.
The seven days include outbound transport, time at the recipient, return transport, inspection, refurbishment and renewed preparation of the coolant packs. Counting only the return journey would underestimate the required stock. Shipping peaks and fluctuating return times must also be considered.
For a mixed recipient base, a combination may fit: reusable systems for regularly supplied addresses with organised returns, and single-use packaging for individual shipments without a practical return route. Both packaging systems require evidence for their respective use.
Define reuse for each component
The outer container, insulation and cooling elements may have different service lives. Define which parts are inspected, replaced or disposed of. A reusable outer container does not automatically make a single-use component reusable.
WHO includes reassessment of reusable shipping systems in the qualification concept. Inspections must establish whether ageing or damage impairs the required performance.
For regular delivery rounds, the article on the last mile also addresses returns, product removals and repeated opening.
Trial the return loop with your own shipments first
If return conditions are unclear, start with a limited operational trial. Measure time at the recipient, return transport, losses, inspection and cleaning effort, and the number of systems suitable for reuse.
Use these data for cost and environmental calculations. A financially favourable solution does not necessarily have the lowest environmental impact; return transport and energy requirements, for example, can affect the results differently.
Sources
- WHO: Qualification of shipping containers, Supplement 13 (2015). Sections 2.1–2.5: development, qualification and reuse of shipping containers.
Sources checked on 12 September 2026.
Compare single-use and reusable systems
Gather the number of recipients, shipping volume, return times and inspection facilities. Use these to compare suitable single-use and reusable systems.