How to Make Cold Brew Coffee at Home with a Hario Bottle

Quick answer

To make cold brew at home with a Hario Cold Brew Bottle, use a 1:8 coffee-to-water ratio, steep for 12 hours at room temperature, then filter and enjoy smooth, full-flavored coffee.

Step-by-step cold brew with the Hario bottle

1. Add coffee grounds: Add 60 grams of coarsely ground coffee to the Hario Cold Brew Bottle. Use a burr grinder set to a coarse setting—think breadcrumb texture. Too fine a grind will make your cold brew muddy and bitter. Stick with coarse.
2. Pour in cold water: Slowly pour 480 ml (about 2 cups) of cold, filtered water over the grounds. Stir gently with a chopstick or spoon to ensure all grounds are saturated. If you skip the stir, dry pockets of coffee will under-extract, leaving a weak brew.
3. Steep at room temperature: Place the silicone stopper in the bottle and let it sit on your counter for 12 hours. Room temperature (68–72°F / 20–22°C) is ideal. Steeping in the fridge slows extraction; stick to countertop for full flavor.
4. Filter and serve: After 12 hours, pour the cold brew through a fine-mesh sieve or paper filter into a clean container. The Hario bottle's built-in filter catches most grounds, but a final strain ensures clarity. Skipping the final filter leaves sediment that turns bitter as the brew sits.
5. Dilute and enjoy: Cold brew concentrate is strong. Mix one part concentrate with one part water or milk over ice. Adjust to your taste. Drinking it straight can be overwhelming. Always dilute at least 1:1.

Product used in this guide

• Hario Cold Brew Bottle: Made from durable heat-resistant glass with a soft silicone top, it doubles as a stylish serving carafe. You can brew, store, and serve from one container, reducing cleanup and keeping your cold brew fresh.