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3 Weeks ago Hario announced a new product, the Hario Filter-in Coffee Bottle for cold brewing. Hario was so kind to send me one to review.

A cold brew… bottle?

Pretty much. The biggest selling point of this bottle is the filter. The filter is a “closed” compartment in the bottle, which means that water can get in and out, but the grounds can not. Filtering the grounds out of the water with a French Press and V60, like I described in Cold Brew Coffee, can be a tedious and slow process. The Filter-in Coffee Bottle enables you to just lift the grounds out.

The shopping list

The shoppinglist

Simplicity is key

  • Freshly roasted whole beans (55 grams)
  • Water (700 ml)
  • Hario Filter-in Coffee Bottle
  • Scale
  • Grinder

Step by step

  1. Grind 55 grams of freshly roasted coffee on a medium-fine setting
    Grind 55 grams of freshly roasted coffee

    Use any type of bean you like. I like Yirgacheffe or Ethiopian for my cold brews

  2. Fill the filter with the ground coffee
    Fill the filter with the freshly ground coffee

    Using a funnel is easier than this, just don’t damage the plastic mesh

  3. Put the lid on the filter
    Put the lid on the filter compartment

    Line up the top and bottom like this, insert straight and then twist the top clockwise to lock

  4. Attach the filter to the top of the bottle
    Attach the filter to the bottle top

    The top of the filter has 2 tabs that fit straight into the top, twist it either way to lock it in

  5. Put the top of the bottle on the bottle
    Put the top on the bottle

    To make this easier, remove the “cork” first

  6. Put the bottle on the scale and tare it
    Put the bottle on the scale and tare it

    Using a scale makes measuring ratios easy

  7. Add 700 ml of water
    Add 700 ml of water

    Using a funnel will, make this easier

  8. Put the “cork” on
    Put the cork on the bottle

    The “cork” keeps the bottle from spilling and debris from falling in

  9. Shake gently and put it in the fridge
    Shake the bottle a few times

    A few shakes will suffice, as the coffee will extract either way over time

  10. After 8 hours, take the bottle out of the fridge
    Take the bottle out of the fridge after 8 hours

    It’s best to put it on a kitchen towel to catch any spills

  11. Gently remove the top with the filter from the bottle
    Remove the top and filter from the bottle

    Let the filter drain before setting it down on a coaster

  12. Detach the filter from the top of the bottle
    Detach the filter from the bottle top

    Twist the top in either direction to detach the filter

  13. Put the top back on the bottle
    Put the top back on the bottle

    Wipe the bottle down with the kitchen towel afterwards

  14. Fill a glass 3/4 of the way with some ice and pour the coffee over it
    Fill a glass 3/4 with ice and pour the coffee over it

    Also great undiluted!

  15. Optionally add milk or water and enjoy!

    Store the remaining coffee in the fridge for up to 2 days


The Filter-in Coffee Bottle has solved a problem that I have run into several times with immersion Cold Brew, filtering. The filter is very well built, locks tightly and has a very fine plastic mesh that doesn’t add or subtract from the taste of the coffee. However, the mesh doesn’t have the fine trapping characteristics of a paper filter, if your grinder produces a lot of fine dust you will find that in the bottom of the bottle. All normal grounds will come out very easily when you lift the filter out, making a half hour task last no longer than 5 seconds. Hario makes this bottle in two colors, the mocha colored one they sent me, and a brown version.

The top of the bottle is rather flexible, which makes it easy to put it on the bottle or take it off. Even though it has plenty of grip on the glass lower half, it isn’t recommended to carry the bottle by the top as it will undoubtedly detach itself. On the side of the bottle there are a few marks indicating specific volumes, including one at the 700 ml level.

On the subject of volume, I would’ve liked to see an alternative, bigger bottle. The brewing vessel is also the serving and storing vessel, making it is impossible to brew the next batch while there’s still coffee in the bottle.

There’s only one thing I didn’t like, which was the recipe that came with it. An 8 hour brewing time is a very short time for cold brew coffee. Putting the bottle in the fridge while brewing slows down the extraction even further, making that 8 hour window too short. I’ve successfully left it on the counter for 36 hours which resulted in a more concentrated, fuller bodied coffee.


Hario has made a very nice looking version of their Mizudashi brewers in the shape of a wine bottle. The filter works great and cleanup is easy, just empty the filter and put everything in the dishwasher. It doesn’t have any real downsides, the recipe in the end is entirely up to you.

Hario Filter-in Coffee Bottle




Ease of use



  • Very fine filter
  • Easy to clean
  • Visually appealing


  • Recipe
  • One size only