What office bottled water really costs you
Published 24 August 2026 · 7 min read
The invoice is the small part. The expensive part is the person who has to think about it every month, and the week your supplier cannot deliver.
Short version: compare on total cost, not per-litre price. Once you count admin time, storage, failed deliveries and the standing order somebody manages, bottled delivery for a mid-sized office is usually more expensive than it appears — and unlike a machine, it never stops costing.
Work out your baseline first
Before comparing anything, get an accurate picture of what you spend now. Most offices underestimate it because the cost is split across invoices, petty cash and somebody's unlogged time.
- The invoice. Bottles per month × price per bottle, plus any delivery or service fee.
- Cooler rental, if you rent rather than own the dispenser.
- Deposits on bottles, and the ones that go missing.
- Emergency top-ups — the shop runs when you unexpectedly run out.
- Sanitisation of the cooler, which is a recurring service most contracts charge for.
Add those and divide by litres consumed. That is your real per-litre cost, and it is usually higher than the number on the invoice.
The costs that never get invoiced
These are the ones that make the comparison misleading if you skip them.
| Hidden cost | Why it adds up |
|---|---|
| Somebody's time | Placing orders, checking stock, chasing late deliveries, receiving them, handling invoices. Half an hour a month of an office manager's time is a real salaried cost, every month, forever. |
| Storage space | Full bottles waiting to be used and empties waiting for collection. In leased office space, floor area has a rand value per square metre. |
| Failed deliveries | Nobody at reception, wrong day, driver could not access the park. Now somebody is making a shop run. |
| Running out | The productivity cost is small but real, and the annoyance cost is larger than it should be. |
| Supply shocks | The week everyone in the city needs bottled water is the week your supplier prioritises larger accounts. |
| Manual handling | Someone lifts a 19-litre bottle onto a cooler. That is roughly 19 kg at an awkward height, repeatedly. |
| Plastic | If your business reports on sustainability, this is a line item with reputational weight. |
What the alternative costs
An atmospheric water generator front-loads the cost instead of spreading it. You pay once for the machine, then you pay for electricity and filters.
From our running cost breakdown, an 80L unit at Johannesburg's top-block rate produces water at roughly R1.64 per litre at rated conditions, and around R2.62 per litre in more typical Highveld summer conditions. Filters are an additional annual cost, either bought as needed or covered by a maintenance plan at R299 per machine per month.
The honest caveat: in dry winter conditions atmospheric output drops and cost per litre rises steeply. In an office this is handled by the purification mode — the machine runs from the mains supply and filters it, which is far cheaper per litre than running the compressor hard for little water. Your team notices nothing.
Running the comparison for your office
Do it like this rather than trusting anyone's headline claim:
- Total your current annual spend — invoices plus rental plus deposits plus emergency purchases.
- Add a realistic admin figure — hours per month × the hourly cost of whoever does it × 12.
- That is your annual bottled cost.
- Estimate the generator's annual running cost — daily kWh × your tariff × 365, plus filters or a care plan.
- Divide the purchase price by the annual saving to get payback in years.
If payback lands under three years, it is usually a straightforward decision. Between three and five, it depends on how much you value not managing deliveries. Over five years, and your consumption is probably too low to justify it — in which case stay on bottled and we will tell you so.
Where bottled water still wins
It genuinely does, in some situations, and it is worth saying:
- Very low consumption. A five-person office getting through a bottle a fortnight will not justify the capital.
- Short or uncertain leases. Though a generator is not plumbed in and moves with you, which softens this.
- Preferring operating cost to capital cost. A legitimate finance preference, not a wrong answer.
- Sites without reliable power. A generator needs electricity; a bottle does not.
The difference that is not about money
The real distinction is dependency. Bottled water outsources your office's water supply to somebody else's logistics chain — one that is most likely to fail at exactly the moment demand across the city spikes.
A generator makes water on site from air, or purifies whatever supply you have. It keeps working when your supplier cannot deliver, and it keeps working when the municipal line is dry. Whether that resilience is worth paying for depends on your business — for a medical practice, a restaurant or a call centre it is worth considerably more than for a quiet six-person office.
Want the payback worked out for your office?
Send us your headcount and roughly what you spend on water now, and we will do the comparison honestly — including telling you if bottled still wins.
Related guides
Sizing a unit to your office headcount
How many litres a day your team actually gets through, and why sizing off the rated figure leaves you short.
Running costsWhat it actually costs to run, per litre
Worked out at current Johannesburg electricity rates, including the dry-winter months where the cost per litre triples.