A single use paper cup weighs very little and occupies a surprising amount of space. Those two facts together explain most of what is wrong with how cups are collected in offices, stations and venues.
If a bin is emptied when it looks full, and it looks full because loose cups have stacked at awkward angles with air between them, then the collection has moved mostly air. The cost of that collection is the same as it would have been had the container held four times the material.
A worked illustration
The numbers below are hypothetical, chosen to make the arithmetic easy to follow. Substitute your own container sizes, cup dimensions and prices before drawing any conclusion about your own sites.
| Cups dropped loose | Cups nested in a tube | |
|---|---|---|
| Effective cups per container | 300 | 1,200 |
| Cups presented per week | 6,000 | 6,000 |
| Container lifts needed per week | 20 | 5 |
| Hypothetical cost per lift | £6 | £6 |
| Weekly collection cost | £120 | £30 |
| Annual collection cost (48 weeks) | £5,760 | £1,440 |
Reading the illustration honestly
Every figure above is invented, and the ratio between loose and nested capacity is the assumption doing all the work. In real sites that ratio depends on cup size, whether lids are removed, how disciplined the capture point is and whether the container is emptied on a schedule or on demand.
What is not invented is the mechanism. When a service is priced per lift, and the material is light and bulky, the density of the material in the container determines the cost. Weight based reporting hides this completely, which is why cup programmes often look inexplicably expensive next to their tonnage.
Three changes that move the number
- Capture at source. A cup dropped into a general bin is unlikely to be recovered from it. Collection points need to be where people finish drinking, rather than only where the cleaning route is convenient.
- Separate the liquid. Residual liquid adds weight, soaks the board and risks rejection of the load. A liquid aperture at the point of disposal usually does more than signage about rinsing, though both help.
- Make nesting the obvious action. If the aperture only accepts a cup in one orientation, most users will comply without reading anything.
What this does not tell you
It does not tell you that cup recycling will save money at your sites. Transport distance, the acceptance criteria of the reprocessor, contract structure and volume all affect the outcome, and a low volume site can be genuinely uneconomic to serve separately.
A separate cup stream also adds costs the table above ignores entirely. Additional collection stations and their liners, the staff time to service and monitor them, the transport of a second stream, the hygiene constraints that limit how long liquid contaminated material can stand, and the cost of missed or rejected collections all sit on the other side of the ledger. A reduction in lifts on one stream is not automatically a net saving across the site.
It also does not tell you that a collected cup is automatically recycled. A poly coated paper cup needs specialist processing to separate the plastic lining from the fibre, so the destination and the reprocessor's acceptance criteria matter as much as the collection itself. Treat any blanket claim that all cups are recycled with caution.
It does tell you where to look. If you are paying per lift for a light, bulky material, the first question is how much of each container is material and how much is air.