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Hookah charcoal on a BBQ: what a 25 mm cube will and will not do

Updated: 23 October 2026

You searched hookah charcoal on a BBQ because a box of 25 mm coconut cubes has barbecue in the title. It can heat a hookah bowl, or sit as a short outdoor top-up. It is not a grate bed. A 100-minute bullet is session fuel. Weber’s 4 kg bag is a contrast in mass, not a test of these cubes. This page stays with the cube rows in the [coconut briquettes comparison](/hub/grill-accessories/coconut-briquettes). Peter F. did not run a cook. Lighting is on [how to light coconut briquettes](/hub/grill-accessories/coconut-briquettes/sub/coconut-briquettes-how-to-light). A qualifying purchase can earn a commission at no extra cost to you.

You searched hookah charcoal on a BBQ because a box of 25 mm coconut cubes has barbecue in the title. It can heat a hookah bowl, or sit as a short outdoor top-up. It is not a grate bed.

Our top picks

Petromax Petromax Cabix Plus (2.98 kg)

Best overall

Petromax Petromax Cabix Plus (2.98 kg)
9.4/10about £17.49
View offer
320° 320° (1 kg, 25 mm)

Rank 2

320° 320° (1 kg, 25 mm)
9.5/10about £8.99
View offer
Kull London KULL (1 kg, 25 mm)

Best value

Kull London KULL (1 kg, 25 mm)
8.3/10about £7.99
View offer
On this page
  1. 1.What a 25 mm cube is for
  2. 2.What the titles add
  3. 3.What the reviews actually did
  4. 4.When to buy a bag instead

What a 25 mm cube is for

A natural coconut cube of this size is made to sit on a foil coil over a shisha bowl. Biognite splits the range that way: cubes for a bowl, larger pillow or hex pieces for a grate. That is manufacturer text, not a UK standard. Fumelo, a UK hookah retailer, says natural 25 mm cubes need a coal burner and are not lit with a lighter. KULL is the specified cheap cube: about £7.99, 72 pieces, 25 × 25 mm, title and item weight both 1 kg, not quick light, 100 minutes on the title, ash under 2.5% as a bullet. 320° is about £8.99 for 72 cubes of 25 mm, the same style of claim, and a 1 kg title against a 1.1 kg field. Neither bullet is a four-hour bed. The claim is seller text about a cube, not a chimney load. A 1 kg box is not a 4 kg briquette bag. If the meal is a grate for an afternoon, buy the other shape.

What the titles add

The word barbecue is why the box is in your hand. 320° is filed under hookah and BBQ. A UK shop page repeats both jobs and the 100-minute line, and it does not show a kettle loaded for two hours. KULL’s item type says BBQ charcoal, while the review bodies describe shisha. Valley names incense, a BBQ, or shisha, with 72 pieces in the bullets and a unit count of 80. Zen names a barbecue beside shisha, about 64 cubes against a unit count of 80. M. ROSENFELD’s title says 3 kg, 25 mm, and 200 pieces, and also mentions grilling, at about £19.90. A bullet says 80 cubes at 26 mm. KENZ is 72 cubes of 25 mm at about £38.79, about £36.94 per kilogram, with no UK body in the sample. A high price and a barbecue phrase still describe a cube. The least muddled bowl coal, whose title, weight, and size agree, is KULL. BBQ on a cube title is a keyword. The bullet beside it is still about 100 minutes.
Petromax Petromax Cabix Plus (2.98 kg)

Testsieger

Petromax Petromax Cabix Plus (2.98 kg)
9.4/10about £17.49
View offer

What the reviews actually did

KULL’s first 50 bodies are United Kingdom. They praise a long shisha burn, and they complain about a stove, ash, or smell. 320° is 4.4 from 3,127, mostly the same shisha story. One UK note says the cubes were used to smoke meat. That note does not make the cube a kettle bed. M. ROSENFELD is 4.3 from 3,220, with 15 bodies in this sample. UK notes include crumbling, a hard light, and cubes that crack. Valley has two UK bodies. One says the cubes smell like gasoline. That smell is a stop. Zen’s one UK body says the cubes do the job and does not say whether the job was a bowl or a grate.

When to buy a bag instead

Buy a briquette bag when the cook is a grate. Petromax Cabix Plus is the square row, about £17.49 on a 2.98 kg field, with a four-hour bullet. The material field says cast iron, which conflicts with the coconut bullets. Nature is the other non-cube title, 4 kg at about £17.08, with no weight field. Both are closer to a bed than a 25 mm cube. The conflicts sit on the coconut briquettes buying guide. Keep the cubes for a hookah coil or a short outdoor top-up. London Fire Brigade guidance keeps these coals out of kitchens, balconies, and tents. The sources do not say how many cubes replace a chimney. Put the box back when the meal needs a bed.

Common questions

Can I cook on 25 mm coconut cubes?
You can heat a hookah bowl, and you can run a short outdoor top-up you stay with. A grate for an afternoon wants a larger briquette. Biognite sizes cubes for a bowl and larger pieces for a barbecue. Fumelo says natural 25 mm cubes need a coal burner.
How many cubes replace a chimney?
The sources do not say. Weber’s UK coconut bag is 4 kg with a claim of up to 3 hours. KULL and 320° are about 1 kg of 25 mm cubes with a 100-minute bullet. Those are different masses. If the meal needs a bed, buy a grill-bed briquette.
Why do the titles say BBQ?
The word places the box in a barbecue search. 320° is filed under hookah and BBQ, while the UK reviews describe shisha. A shop page repeats both jobs and does not show a kettle loaded for two hours. The bullet beside the word is still about 100 minutes.
Will they last 100 minutes in a kettle?
That figure is a seller line about one cube, on KULL’s title and on 320°’s bullets. It is not a measured kettle bed. The UK notes talk about a shisha burn, ash, smell, and a slow light. One 320° note mentions smoking meat. Plan a briquette bag for the afternoon.
Which cube is the least muddled?
KULL, at about £7.99, because the title and the weight both say 1 kg, for 72 pieces of 25 × 25 mm. 320° has the larger UK sample and a 1 kg title against 1.1 kg. Valley, Zen, and M. ROSENFELD each print two piece counts. A gasoline smell on a Valley note is a stop.

Related pages

Best coconut briquettes

Coconut briquettes

Coconut briquettes buying guide: bag, cube, weight

How to light coconut briquettes without lighter fluid

Coconut briquettes vs lumpwood: a sear or long cook

Sources

Public UK sources used for this comparison. Listing prices, stars and review counts are the amazon.co.uk figures for these eight ASINs. Retrieved 21 October 2026.

  1. Weber UK, coconut shell briquettes (retrieved 21 October 2026)
  2. London Fire Brigade barbecue leaflet (retrieved 21 October 2026)
  3. GOV.UK fire safety outdoors (retrieved 21 October 2026)
  4. GOV.UK smoke control rules (retrieved 21 October 2026)
  5. Defra authorised fuels, England (retrieved 21 October 2026)
  6. BS EN 1860-2:2023 catalogue entry (retrieved 21 October 2026)
  7. Mencarelli and others, 2025, ash and moisture ceilings (retrieved 21 October 2026)
  8. Air Quality (Domestic Solid Fuels Standards) (England) Regulations 2020 (retrieved 21 October 2026)