20 vials
Bacteriostatic water, 20 × 10ml vial
Twenty sealed 10ml vials. The first properly bulk quantity — bought to cover a period of work rather than to meet a particular requirement.
Who it suits: A laboratory or workshop covering months of continuing use in one order.
20 vials · 10ml vial
£64.99£3.25 per vial
- 20 × bacteriostatic water, 10ml vial
- £64.99
- Delivery
- Free
- Total
- £64.99
This order qualifies for free UK delivery.
You will be taken to Stripe to pay. Delivery address is collected there.
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Buying by the period rather than by the vial
At this quantity the question stops being how many vials you need and becomes how long you want to go without ordering again. The total volume below is the figure to plan against.
| Pack | Price | Per vial | Per ml | Saving |
|---|---|---|---|---|
| Single vial | £5.99 | £5.99 | 59.90p | — |
| 5 vials | £21.99 | £4.40 | 43.98p | 27% |
| 10 vials | £34.99 | £3.50 | 34.99p | 42% |
| 20 vials (this page) | £64.99 | £3.25 | 32.49p | 46% |
| 50 vials | £149.99 | £3.00 | 30.00p | 50% |
| 100 vialsBest value per vial | £274.99 | £2.75 | 27.50p | 54% |
Volume and delivery
- Vials in the pack
- 20
- Total volume
- 200ml
- Draws across the pack
- 200
- Price per vial
- £3.25
Each sealed, 10ml vial
20 × 10ml
At 1ml each, or 100 at 2ml
32.49p per ml
What the saving is worth here
The comparison against buying singly is printed below in both cash and percentage terms. Both are computed from today's prices, and both move if the prices do.
What this pack saves
Against buying 20 vials one at a time, at today’s single-vial price of £5.99.
- Bought singly
- £119.80
- This pack
- £64.99
- You save
- £54.81 (46%)
2 packs cost less per vial
Buying 50 vials instead works out at £3.00 a vial against £3.25 here — £0.25 less on every vial. If the exact number of vials is not fixed for you, that is the better buy, and we would rather say so than let you find out afterwards.
Specification
Identical on every pack size — it is one product, sold in different quantities.
- Composition
- Sterile water with a bacteriostatic preservative, in a sealed multi-dose vial.
- Format
- Sealed multi-dose vial, 10ml vial. This pack contains 20 of them, 200ml in total.
- Draws per vial
- 10 at 1ml, or 5 at 2ml. How many you get depends entirely on the volume taken each time.
- Storage
- 2–8°C, as printed on the label
- Once opened
- 28 days from first puncture
- Appearance
- Clear, colourless liquid, free of visible particles
- Also sold as
- bac water, bacteriostatic mixing water, mixing water, BAC water
Questions about this pack
Asked about this quantity specifically. The general questions about the product are on the FAQ page.
- What does the 20-pack save against buying singly?
- Twenty vials bought one at a time would be £119.80. This pack is £64.99 — a saving of £54.81 (46%).
- How long does 20 vials' worth of water last?
- That depends entirely on your rate of use, which is why the figure we publish is volume rather than time: 200ml, or 200 draws at 1ml.
- Can I order two 20-packs?
- Yes. Up to 10 packs go through the checkout in one order, which is 200 vials.
Other pack sizes
10 vials
£34.99 · £3.50 per vial
Steady, continuing use — a working stock rather than a purchase.
50 vials
£149.99 · £3.00 per vial
Laboratory procurement, teaching facilities and workshops buying a term or a quarter at a time.
100 vials
£274.99 · £2.75 per vial
Wholesale and repeat institutional supply, where unit price and continuity of stock are the deciding factors.
Prices last changed 2026-09-07. Single vial from £5.99.