Milton
Cold Water Steriliser
7.4/10 overallAbout £22
A large cold-water tub steriliser that uses Milton sterilising tablets or fluid instead of heat, holding up to 6 bottles for 24 hours of protection per fill.
The verdict
The Milton Cold Water Steriliser, around £22, uses a tablet or fluid dissolved in 5 litres of tap-cold water rather than heat, holding up to 6 bottles and staying effective for 24 hours once made up. It needs no electricity and works anywhere with a tap, including holiday cottages, but takes a full 15 minutes and leaves items wet, needing an air dry.
Milton's cold water method is the odd one out in this category: instead of steam or a microwave, you dissolve a sterilising tablet (or use Milton fluid) in 5 litres of tap-cold water, submerge bottles, teats and accessories under the supplied plastic press, and leave them for 15 minutes. There's no electricity, no heating element to eventually fail, and once made up the solution keeps working for 24 hours, so repeat loads throughout the day don't need a fresh cycle each time.
Against the electric steam units in this category (Tommee Tippee Steri-Express, Philips Avent 3-in-1) the trade-off is speed and kitchen space versus running cost and flexibility. Steam sterilisers finish a load in 5-10 minutes and leave bottles dry-ish; this takes a full 15 minutes just to sterilise, and items come out wet and needing a rinse-free air dry, plus you're buying tablets or fluid on an ongoing basis rather than just electricity. What you gain is a genuinely large capacity (6 standard bottles at once, more than the NUK microwave option), no plastic parts degrading from repeated heat cycles, and a unit that works anywhere there's a tap, including holiday cottages or campsites with no microwave or spare socket.
It's also the method most likely to be familiar from hospital maternity wards, which counts for something with parents who'd rather not experiment. The recurring tablet cost (a pack of 28 tablets is roughly £4-5, so a few pence per use) is worth factoring in against the near-zero running cost of a microwave steriliser, but it's still cheaper over a year than most electric units' upfront price plus electricity.
For a family without regular microwave or counter access, or anyone who'd rather not run a hot appliance daily, this is a genuinely different way to solve the same problem. For most people wanting the fastest turnaround with minimal ongoing cost, an electric steam steriliser will still be more convenient day to day.
Is the Cold Water Steriliser worth it?
- Large capacity, fits 6 standard bottles at once
- No electricity or heating element to break
- Solution stays effective for 24 hours, good for repeat use
- Works anywhere with tap water, useful for travel or no microwave
What are the downsides of the Cold Water Steriliser?
- Slower than steam (15 minutes) and items come out wet
- Ongoing cost of tablets or fluid rather than just electricity
- Needs a rinse-free air dry step rather than coming out ready to use
Specs
- Type
- Cold water chemical (tablets or fluid)
- Capacity
- Up to 6 standard bottles, 5L water
- Cycle time
- 15 minutes to sterilise
- Ongoing cost
- Tablets/fluid, a few pence per use
- Solution life
- 24 hours once made up
- Electricity needed
- No
How we scored it
Sterilising Effectiveness
Cycle time and reliability of killing bacteria across a full load.
Capacity
Number of bottles and accessories it fits in one cycle.
Largest single-load capacity in this category at 6 standard bottles, ahead of both the NUK microwave option (3) and roughly level with the electric steam units, but the 5L tub takes more counter or cupboard space to store.
Ease of Cleaning
How easy the steriliser itself is to descale and keep clean.
Weighted by importance for this category — see our editorial policy for how we test.
How this review was done
We haven't used the Cold Water Steriliser ourselves yet. This review is built from Milton's published specifications and product information, and scored the same way as everything else on the site. We'll update it, and the badge above, once we've tested it hands-on.
How it compares
|  |  |  | |
|---|---|---|---|---|
| Price | About £22 | About £117 | About £15 | About £45 |
| Overall score | 7.4/10 | 6.4/10 | 7/10 | 8.1/10 |
| Type | Cold water chemical (tablets or fluid) | UV-LED, no water or chemicals | Microwave steam | Electric steam |
| Capacity | Up to 6 standard bottles, 5L water | Claimed up to 6 bottles; 3-4 comfortable in practice | Up to 3 bottles | Up to 5 bottles + accessories |
| Cycle time | 15 minutes to sterilise | Approx. 5-7 minutes sterilise, +15-20 min to dry | Approx. 3 minutes (microwave-dependent) | Approx. 5 minutes |
Frequently asked questions
How does the Milton cold water method work?+
You dissolve a sterilising tablet (or use Milton fluid) in 5 litres of tap-cold water, submerge bottles, teats and accessories under the supplied plastic press, and leave them for 15 minutes — no electricity or heating element involved.
How much can the Milton steriliser hold at once?+
It scores 8/10 for capacity, the largest single-load capacity in this category at 6 standard bottles, ahead of the NUK microwave option's 3 and roughly level with the electric steam units, though the 5L tub takes more counter or cupboard space to store.
Is the Milton steriliser slower than an electric one?+
Yes — it takes 15 minutes to sterilise versus 5-10 minutes for electric steam units like the Tommee Tippee Steri-Express or Philips Avent 3-in-1, and items come out wet, needing a rinse-free air dry rather than coming out dry-ish.
Does the Milton solution need to be made up fresh each time?+
No — once made up, the solution stays effective for 24 hours, so repeat loads throughout the day don't need a fresh cycle each time, though there is an ongoing cost of a few pence per use for tablets or fluid.
Guides that mention this
Reviewed by
Sepehr
Software engineer, soon-to-be dad, uncle to four — the tech-obsessed half of the two of us testing this stuff. Currently building this site with my wife, ahead of our own baby arriving.