• Coopers Carbonation Drops 250g
  • Coopers Carbonation Drops – key facts
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Coopers Carbonation Drops

Coopers Carbonation Drops

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Coopers Carbonation Drops are pre-measured sugar drops for priming bottled home brew. Instead of measuring and dissolving priming sugar, you drop them straight into each clean bottle before filling, giving a consistent fizz from bottle to bottle.

Why brewers use them

  • No measuring, dissolving or mixing a priming solution
  • Each drop is a set amount of fermentable sugar, so carbonation is even across the batch
  • Dissolves quickly in the bottle
  • Works with glass or PET bottles

How many drops per bottle (Coopers guide)

  • 330-375ml bottle: 1 drop
  • 500ml bottle: 1.5 drops
  • 740-750ml bottle: 2 drops

How to use

Add the drops to each bottle, fill with your finished beer and cap. Stand the bottles upright somewhere dark at room temperature for at least 2 weeks to carbonate before chilling and checking the fizz.

Complete the set

Prefer to weigh out sugar instead? Try our priming sugar calculator.

Frequently Asked Questions
How many carbonation drops per bottle?
One drop per 500ml bottle. For larger 740ml PET bottles, use one and a half drops. Don't use two full drops in a 500ml bottle — this will over-carbonate and can cause gushing or burst bottles.
Can I use carbonation drops with any beer kit?
Yes — Coopers Carbonation Drops work with any home brew beer, regardless of brand. They're also suitable for home brew cider. Use one per 500ml bottle as standard. Do not use for wine, which doesn't require bottle priming.
My bottles aren't carbonating — what's wrong?
The most common cause is bottling before fermentation was complete. Always confirm with a hydrometer before bottling. Also check that bottles were sealed tightly and are being stored at room temperature (18–22°C) for conditioning. Carbonation takes 1–2 weeks minimum.
Are carbonation drops better than bulk priming with sugar?
Carbonation drops are more convenient and consistent for beginners, as each bottle gets exactly the same amount. Bulk priming (dissolving sugar in water and adding to all the beer before bottling) can produce slightly more even carbonation across the batch, but requires more equipment and precision. Both methods work well.
How long do carbonation drops last?
Stored in a cool, dry place in a sealed container, carbonation drops last at least 2 years. If they've absorbed moisture and clumped together, they may not dissolve as reliably — use fresh drops if in doubt.
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j
james paton

I would prefer them to a bit more up-to date

T
Tom

Good