Our room odourisers come in three bottle sizes — 10ml at £3.99, 15ml at £5.49 and 25ml at £8.49. The 10ml works out at 39.9p per millilitre, the 15ml at 36.6p, and the 25ml at 34.0p.
So the bigger the bottle, the less you pay per millilitre — but the gap between sizes is smaller than most people assume, and the real saving sits in multipacks. This guide walks through all of it. For the wider picture on brands and strengths, see our complete UK buying guide.
The three sizes at a glance
| Size | Single price | Price per ml | Best for |
|---|---|---|---|
| 10ml | £3.99 | 39.9p | Trying a new brand |
| 15ml | £5.49 | 36.6p | The everyday default |
| 25ml | £8.49 | 34.0p | Brands you already know |
10ml is the standard bottle and the one most brands are built around. It's the widest part of our range — you'll find the most names here, from long-established ones like Liquid Gold through to newer arrivals. At £3.99 it's also the cheapest way to find out whether a brand suits you.
15ml holds half as much again as the standard bottle for £1.50 more, which brings the cost per millilitre down by about 8%. This is the size to step up to once you've settled on something. XL Gold is the Gold range in this format. The X range sits here too, though at £6.99 those are priced above the 15ml norm — you're paying for the formula, not the volume.
25ml is our largest bottle, two and a half times the standard size. Per millilitre it's the cheapest single bottle we sell at 34.0p, though the gap to the 15ml is under 3p — so choose it as much for fewer, larger bottles as for the saving. It's a shorter list because not every brand produces one: English Xtra Strong, Original Amsterdam Gold and Who's Ya Daddy! Bears Own.
You can browse each size directly: 10ml, 15ml and 25ml.
The multipack maths, and why it matters
Here's the part most buying guides skip. Our three-packs are priced at between 15% and 22% off the single-bottle price, and when you work out the per-millilitre cost, the range splits cleanly into two tiers:
| What you buy | Total volume | Price | Per ml |
|---|---|---|---|
| 1 × 10ml | 10ml | £3.99 | 39.9p |
| 3 × 10ml | 30ml | £9.99 | 33.3p |
| 1 × 15ml | 15ml | £5.49 | 36.6p |
| 1 × 25ml | 25ml | £8.49 | 34.0p |
| 3 × 15ml | 45ml | £13.99 | 31.1p |
| 3 × 25ml | 75ml | £19.99 | 26.7p |
Three things fall out of that table. First, a three-pack of 10ml bottles at 33.3p per millilitre is cheaper than any single bottle, including the 25ml at 34.0p — so buying three small bottles beats stepping up a size on price, and you get three sealed bottles into the bargain.
Second, the genuine value tier is the larger three-packs: 3 × 15ml at 31.1p per ml and 3 × 25ml at 26.7p. The 25ml pack is over 20% cheaper per millilitre than even the best single bottle, and a third cheaper than a 10ml single.
Third, the worst value in the range is a single 10ml — which is fine, because that isn't what it's for. It's the low-risk way to try something.
Those other grounds usually favour the multipack. Three sealed bottles keep better than one large bottle opened and worked through slowly, and you're not committed to a single fragrance. The full range is in Multipacks.
One further thing worth factoring in: UK delivery is free on orders of £19.99 or more. The 25ml three-packs at £19.99 qualify on their own. A 15ml three-pack at £13.99 gets there with a 25ml single or two 10ml singles added, and six 10ml singles at £23.94 clear it comfortably — so saved postage is part of the multipack's value too.
The cheapest way to try several brands
Our mixed trios cost exactly the same as a same-brand three-pack — £9.99 — but give you three different bottles instead of three of one. The Classic Trio pairs Purple Haze, Bang!! Aroma and The Dogs Bollocks; the Gold Trio covers the Gold range in one go.
If you're new to the category and don't yet know which names you prefer, a mixed trio tells you far more than one bottle does, for less than the price of three singles.
Why bottle size affects freshness
Room odourisers are volatile liquids. Every time a bottle is opened, air gets in, and air is what degrades the contents over time.
That reframes the question. It's less "how much do I get for my money" and more "how long will this bottle stay in good condition once I've opened it". A 10ml used up over a few weeks is consistent from first open to last. A 25ml sitting half-full in a drawer for six months is a different proposition — and the 25ml's per-millilitre saving over the 15ml is under 3p, so there is little reason to accept that trade-off.
So the practical rule is: buy the smallest size you'll realistically get through, unless you're deliberately stocking up on something you already know.
Storage
Whatever size you choose, storage determines how long it stays good. Keep bottles somewhere cool, dark and dry with the cap firmly on, away from direct sunlight and away from any heat source. A cupboard or a drawer is fine. A windowsill, or a shelf above a radiator, is not.
Unopened bottles keep considerably longer than opened ones — which is the real argument for multipacks over one big bottle. Open the next one only when the last is finished, and every bottle is fresh when you start it.
Refrigeration gets suggested sometimes. It isn't necessary, and taking a bottle in and out of the cold introduces a condensation risk. A stable cool cupboard beats a cold one you keep opening.
Size and strength are separate decisions
A common mix-up worth clearing up: bottle size and strength are unrelated. Our range runs from Classic through Strong, Extra Strong and Ultra Strong, and buying a bigger bottle doesn't get you a different formulation — just more of the same one.
Pick the brand and strength you want first. Then decide how much of it to buy. Treating those as one decision is how people end up with 25ml of something they'd rather have tried in 10ml.
Which size should you buy?
New to the category: a mixed trio at £9.99, or a single 10ml at £3.99. Low outlay, and you learn something either way.
New to a particular brand: the 10ml, if that brand does one. Not every brand is available in every size.
You know what you like: the 15ml at £5.49, or a three-pack of 10ml at £9.99. The three-pack is a few pence cheaper per ml, so pick on whether you'd rather have one larger bottle or three sealed ones.
You know exactly what you want and get through it steadily: a three-pack of 15ml at 31.1p per ml or 25ml at 26.7p — the best value we do.
Watching the budget: Under £4 collects every single bottle below that mark.
Common questions
Is the bigger bottle always better value?
Among single bottles, yes — the 10ml is 39.9p per ml, the 15ml 36.6p and the 25ml 34.0p. But a three-pack of 10ml already beats the 25ml single, and the 15ml and 25ml three-packs are cheaper again. If you want a real saving, buy a three-pack rather than a bigger bottle.
Do all brands come in all three sizes?
No. The 10ml is the most widely available, 15ml is a step up that many brands offer, and only a few come in 25ml. Check the individual listing.
Is a three-pack better than one bigger bottle?
On a 10ml three-pack versus a single 15ml or 25ml, the three-pack is a few pence cheaper per millilitre and wins on freshness, because three sealed bottles keep better than one opened one. On a 15ml or 25ml three-pack, the price gap is wider still.
How long do unopened bottles keep?
Longer than opened ones, provided they're stored cool, dark and dry with the cap sealed. Stock up only as far ahead as your storage conditions genuinely allow.
What's the cheapest way to try the range?
The Classic Trio or Gold Trio at £9.99 for three different bottles — the same price as three of the same brand, and you learn three things instead of one.
Browse the full range at Poppers and More. Sold as room odourisers, strictly 18+.