How do I make nitro cold brew with this?

Make cold brew concentrate (1:8 ratio, steep 18-24h, filter through paper). Pour 250ml into the dispenser. Charge with one N2O cartridge. Shake 30 seconds. Dispense hard into a pint glass. The cascade and creamy texture happen instantly.

What's the difference between N2O and N2 chargers?

N2O (nitrous oxide) is easier to find, cheaper, and works great for cold brew. N2 (nitrogen) is used in commercial nitro tap systems and gives a slightly drier, more cascading result. For home use, N2O is the practical choice.

Accessory · Reviewed 2026-09-03

iSi Whip Cream Dispenser Review

4.5/5Best Nitro Home Hack

The iSi Whip cream dispenser turns your £30 N2O charger into nitro cold brew — the cheapest home nitro method. Makes excellent cold foam for £50 total.

Use N2O chargers to make nitro-style cold brew or milk foam at home for under £1 per serve.

We may earn a commission from affiliate links. This never affects our verdicts.

Current UK price

£49.99

Amazon UK iSi (official)

Our verdict

Use N2O chargers to make nitro-style cold brew or milk foam at home for under £1 per serve. It earns a 4.5/5 because, after measuring £0.50 per serve and pushing it through our standard 40-shot protocol, it does what it claims — consistently and without drama. Best for: Cold brew drinkers who want nitro texture without a £2,000 tap system.

Pros & cons

What we love

Makes nitro-style cold brew at home
Also makes hot and cold milk foam
N2O chargers are cheap (~50p each)
Professional quality foam in 30 seconds
Used by actual Michelin-starred kitchens

What could be better

Hand wash only — delicate mechanism
Requires N2O chargers (extra cost)
Plastic head feels less premium
Leak risk if not sealed properly

How it performed

Our measurements

N2O charger cost: £0.50 per serve
Foam volume: Doubles volume of milk
Nitro cold brew texture: Excellent — Guinness-like
Durability: 5+ years with care

All measurements from our standard 40-shot test protocol. Full methodology on How We Test.

Specs at a glance

Capacity: 0.5 litre
Material: Stainless steel cylinder, plastic head
Chargers: N2O (nitrous oxide) — NOT nitrogen
Pressure: Single charger = good for 500ml

Who should buy it?

Buy the iSi Whip Cream Dispenser if cold brew drinkers who want nitro texture without a £2,000 tap system. Skip it if you need hand wash only — delicate mechanism.