Description
The Hario Mizudashi is a cold brew pot in its simplest possible form: a heatproof glass decanter, a tall cylindrical mesh filter that hangs from the neck, and a plastic lid. The listing gives the capacity as 600 milliliters, which the specification block also states as 20.3 fluid ounces, with a weight of 13 ounces and a first availability date of March 2014. Nothing is powered, and there are no consumable parts at all.
Cold steeping is a slow process by design. Grounds sit in cold water for eight to twenty four hours in the refrigerator, extracting far less of the sharp acidic material that hot water pulls out in minutes. The result is a rounder, sweeter concentrate that keeps for days. The trade is that nothing can be produced on demand, which is the dividing line running through every product in the cold brew coffee makers covered on this site.
How the Filter Basket Works
The filter is a fine polyester mesh stretched over a frame, and it hangs the full depth of the decanter so the grounds stay suspended in the water column rather than sitting in a layer at the bottom. Coffee goes into the mesh, water is poured in slowly so every ground is wetted, and the whole thing goes into the refrigerator. Lifting the filter out at the end removes the grounds in one movement.
Polyester mesh is finer than the metal screens used in most steepers, which is why the finished coffee is notably clear for an immersion brew. It also means the mesh clogs if the grind is too fine, and medium coarse is the working range. The filter is the one wear part in the product, and it is the part that determines how long the pot stays pleasant to use.
The spout and the lid do the rest of the work. The lid seats on the neck rather than sealing against it, so the pot is designed to stand upright in the refrigerator and not to travel. Pouring is clean because the neck is narrow and the glass is thin at the lip, and the filter can be left in place while pouring if the coffee is meant to keep extracting, though most owners lift it out once the steep is finished.
Capacity and Batch Planning
Six hundred milliliters is small. It is roughly two and a half mugs of finished coffee, or fewer if the concentrate is served neat rather than diluted, and it is the specification most likely to disappoint a buyer who did not check. Published owner feedback frequently mentions brewing more often than expected, which is a straightforward consequence of the volume rather than a fault.
Against that, the small footprint is the reason people buy it. The pot stands in a refrigerator door or beside the milk without displacing anything, and a household can keep two going on alternate days. Buyers who want a multi day batch from one loading need roughly double the volume, which points toward a larger steeper such as the Primula Burke cold brew carafe or the mason jar style pitchers.
Glass, Filter Material and Care
The decanter is heatproof glass, which matters less for cold brewing than it does for cleaning, since it means the pot tolerates hot water and does not have to be babied at the sink. Glass also holds no flavor between batches, which a plastic vessel eventually will. The listing records the material simply as glass, with the lid and filter frame in plastic.
The polyester filter needs the most attention. Coffee oils build up in the weave and are best removed with a soft brush under running water rather than detergent, which the mesh holds onto. Published owner feedback repeatedly mentions the filter as the component that eventually needs replacing, and Hario does sell it separately, which is the main reason this design has stayed in the catalog since 2014.
What the Listing Gets Wrong
The specification block contradicts itself in two adjacent rows. Included Components lists decanter, filter and lid, while a separate row headed With Lid reads No. The product plainly ships with a lid; it is visible in every photograph and it is the brown part the color field refers to. One of those rows is simply false.
The dimension row reads 8.58 inches wide by 4.33 inches high, which has the axes swapped: this is a tall, narrow pot, and the larger figure is its height. A buyer sizing a refrigerator shelf from those numbers gets the wrong answer in both directions. The imported price field on this record reads 205820.58, a price string concatenated with itself rather than any figure a retailer charged, and the UPC field holds two separate barcodes in one value. Model Name and Item model number both read Mizudashi Cold Brew Coffee Pot, so the actual model designation appears nowhere.
What the Specifications Do Not Settle
No steep time is published, and no coffee to water ratio, which are the only two variables a cold brewer controls. The grounds capacity of the filter is unstated, so there is no way to know how much coffee it holds before it arrives. Nothing indicates the mesh aperture or the expected life of the filter, though replacements are available.
The listing does not say whether the glass is dishwasher safe, whether the lid seals well enough to lay the pot on its side, or how long finished coffee keeps in the decanter. Owner reports commonly mention documentation written for the Japanese domestic market, so a first time buyer should not count on the box for guidance. There is no warranty statement in the specification block.
Two further absences matter for a glass vessel. No maximum water temperature is given, which is the number that decides whether the decanter can be rinsed straight from the kettle or whether the glass should be brought up gradually. And no replacement decanter is listed, so a broken carafe may well mean buying the whole pot again even though the filter and lid survive unharmed.
Who It Suits and Who Should Look Elsewhere
The Mizudashi suits one drinker, or two occasional ones, who want clean tasting cold brew with no consumables and no gadgetry, and who do not mind starting a batch the night before. The polyester filter produces a clearer cup than metal mesh, the glass keeps the coffee tasting the same in month twelve as in month one, and the replaceable filter makes it a long term purchase rather than a seasonal one.
It does not suit a household. Six hundred milliliters will not carry three coffee drinkers through a weekend, and buyers in that position should start at a liter or more with something like the NFFTYUUT mason jar cold brew maker or the Takeya cold brew pitcher. Anyone who wants cold coffee the same morning should chill a hot brew instead, and anyone who wants a small strong cup in two minutes wants the AeroPress Original rather than any steeper.
