Hario Mizudashi vs Ovalware Side-by-Side Comparison

Reviewed
Our recommendations are made independently through research and testing following our review procedure. We may receive commissions from purchases made via our links at no additional costs to you.
Tested Using Methodology v1.0
Updated Nov 28, 2022
Tested Using Methodology v1.0
Updated Nov 28, 2022
Hario Mizudashi Cold Brew Coffee Maker Review
Ovalware Cold Brew Coffee Maker Review
Coffee Maker type
coldBrew
coldBrew

Our Verdict

Overall Verdict

7.7
Overall Score
  • Brew Quality (50%)
    6.5/10
  • Design (15%)
    7.2/10
  • Ease of Use (35%)
    9.7/10
8.5
Overall Score
  • Brew Quality (50%)
    7.8/10
  • Design (15%)
    9.0/10
  • Ease of Use (35%)
    9.3/10

On first inspection, the Hario Mizudashi looks very appealing. The tall and slender glass carafe is very catchy and it’s an easy fit for any refrigerator door. Although cleaning requires a bottle brush and care for the delicate glass, the plastic and nylon filter has a convenient removable base. 

That said, the Hario Mizudashi produces a weak and sourish brew. This is due to the filter being too short, the brew ratio unfavorable, and worst of all, the vessel is not airtight. For these reasons, we do not recommend the Hario Mizudashi as a worthwhile cold brew coffee maker.

The Ovalware, by comparison, is a well-designed cold brew coffee maker. It has a long stainless steel immersion filter, and the carafe has a thin neck and wide base favorable to brewing. While it may be too wide for small refrigerator doors, its silicone base has a very comfortable fit.

Brew Quality

6.5
Performance Scores
  • Bouquet (10%)
    7.0/10
  • Drinkability (70%)
    6.0/10
  • Sediment (20%)
    8.0/10
7.8
Performance Scores
  • Bouquet (10%)
    7.5/10
  • Drinkability (70%)
    8.0/10
  • Sediment (20%)
    7.5/10
7.0

Bouquet

7.5

After 18 hours of brewing, the bouquet produced by the Hario Mizudashi can best be described as medium strength. The brew brought out a dominant nuttiness, but with underlying bitter and resinous notes. Sweet notes were very understated.

The Oval produced a somewhat surprising bouquet, but its medium strength was more or less in line with the brew ratio. The bouquet had distinctly herbie and somewhat earthy, chocolatey notes, and we were keen to see what kind of flavor it produced.

6.0

Drinkability

8.0
Hario Mizudashi Drinkability
Hario Mizudashi Drinkability 1

Compared to other cold brew coffee makers we tested, the Hario output tasted like a low-grade coffee. There was no real distinction to it and the texture was not smooth. We detected a mild woodiness indicating an under-extracted brew. With dilution, it tasted somewhat watery and sour with a bitter aftertaste.

Ovalware Cold Brew Drinkability

With a one-to-one dilution, the Ovalware cold brew had a mildly roasted and surprisingly sweet taste. It also felt rounded and smooth, but lacked the rich complexity that our top brewer was able to produce. There was a slight bitterness, but overall the taste was very satisfying and not watery at all.

We would recommend less dilution for a more robust flavor - maybe two thirds coffee to a third of water. It may also be worth brewing for longer than our standard 18 hours.

8.0

Sediment

7.5
Hario Mizudashi Sediment

The Hario produced noticeable sediment, but most of it is relatively fine with only a few large granules present. The filter worked well, but at the same time its design may be a compromise for the poor quality of the brew.

Ovalware Cold Brew Sediment

We brewed the Ovalware undisturbed  for 18 hours in a refrigerator. After allowing the contents to settle, we decanted the brew and the sediment left behind was quite substantial. Decanting the contents a second time, or even filtering through a paper filter, would probably be the best solution. However, we felt the good quality of the brew concentrate was a reasonable compromise on the filter.

Design

7.2
design Scores
  • Stopper / Lid (30%)
    7.0/10
  • Filter (40%)
    6.0/10
  • Build Quality (30%)
    9.0/10
9.0
design Scores
  • Stopper / Lid (30%)
    9.0/10
  • Filter (40%)
    9.0/10
  • Build Quality (30%)
    9.0/10

In the Box

Hario Mizudashi In the Box
  • Box WDH: 4.9 x 4.3 x 11.8 in
  • Brew decanter
  • Detachable filter
  • Manual

The Hario Mizudashi comes in a very nice box. On the side are simple instructions highlighting its key features. There is no unnecessary plastic covering, and inside you find the decanter, detachable filter, and a handy instruction manual.

Ovalware Cold Brew In the Box
  • Box WHD: 5.5 x 9.5 x 5.5 inches
  • Assembled brewer
  • Promotional card
  • User manual and warranty

The Ovalware comes neatly packaged in a custom box, but a little over packaged with plastic bubble wrap. The user manual was inside the carafe which is common but annoying because it bends. You should register your warranty on their website and there’s a handy QR code link for non-English instructions in most major languages.

Decanter

Hario Mizudashi Decanter
  • Heightwith Stopper Lid:
    11.5 in (294 mm)
  • Base Diameter:
    3.7 in (94 mm)
  • Width:
    5.4 in (138 mm)
  • Weight:
    15.0 oz (425 g)
  • Material:
     heat-resistant glass, polypropylene plastic

The Hario Mizudashi brew decanter is quite attractive in its design and this is a key reason why people choose to buy it. It fits easily into the door of even a small refrigerator and looks good on the table. The handle is fixed to the glass and cannot detach and there are a number of colors to choose from.

Ovalware Cold Brew Decanter
  • Heightwith Stopper Lid:
    8 in (205 mm)
  • Base Diameter:
     4.7 in (120 mm)
  • Width:
    5.5 in (140 mm)
  • Weight:
    17.3 oz (490 g)
  • Material:
    borosilicate glass

The decanter is very attractive and the markings in cups and milliliters are very useful. The handle was comfortable and the flat edge easy to grip. The carafe poured well with the small lip, a nice feature that means less chance of accidental chipping.

We particularly liked the base’s silicone stand. There’s a hole to let out air and you can easily hook it off for cleaning. Overall, the carafe design is excellent.

7.0

Stopper / Lid

9.0
Hario Mizudashi Stopper / Lid
  • Diameter:
    3.7 in (95 mm)
  • Material:
    polypropylene plastic
  • Additional Features:
    N/A

While we liked the slender and practical design of the Hario Mizudashi decanter, the  lid design is not completely airtight. This we thought to be a fundamental design flaw especially for odor contamination in the refrigerator and excess oxidation while brewing. The lid itself has a snap mechanism so it doesn’t slip off accidentally.

Ovalware Cold Brew Stopper / Lid
  • Diameter:
    3 in (75 mm)
  • Material:
    stainless steel
  • Additional Features:
    silicone seal

The stainless steel stopper is a nice complement to the glass design. Our only qualm was the quality and fit of the silicone seal. Without the filter, the stopper was not so tight and required a little turning to get a more airtight fit.

6.0

 Filter

Filter
Hario Mizudashi Filter
  • Length:
    6.5 in (165 mm)
  • Diameter:
    3.3 in (85 m)
  • Material:
    polypropylene frame, polyester resin
  • Additional Features:
    detachable base

The best thing about the filter is the removable bottom which makes it easy to clean. Additionally, it’s small, stores away easily, and appears to be of high quality. However, the relatively short length of the filter and its lack of porousness created a weak and rather sourish brew.

Ovalware Cold Brew Filter
  • Length:
    6.9 in (175 mm)
  • Diameter:
    2.7 in (70 mm)
  • Material:
    lasered stainless steel
  • Additional Features:
    silicone seal

The filter appeared well-made and there were no sharp edges. We noticed the holes on the bottom seemed finer than on the sides. The silicone seal for the filter, and for the stopper, was not the best quality. In our testing, we have come across better quality designs, so this was a little disappointing considering the Ovalware brand status. Our brew quality test showed that the paucity of the filter allowed for a good brew to develop.

9.0

 Build Quality

Build Quality
Hario Mizudashi  Build Quality

The Hario Mizudashi is well built. The brew decanter is elegant and the plastic parts fit well. The filter is also easy to clean thanks to its removable end cap. However, the design is flawed in the short length of the filter and the non-airtight lid.

Ovalware  Build Quality

Except for the compromise on the silicone stoppers, the overall design quality of the Ovalware is excellent. The filter is well-machined and the silicone cushion is an extra that you don’t often find on other cold brew coffee makers.

Ease of Use

9.7
usability Scores
  • Brewing (45%)
    10/10
  • Decanting (35%)
    10/10
  • Cleaning and Storage (20%)
    8.5/10
9.3
usability Scores
  • Brewing (45%)
    10/10
  • Decanting (35%)
    9.0/10
  • Cleaning and Storage (20%)
    8.5/10
10

 Brewing

Brewing
Hario Mizudashi Brewing

Brewing with the Hario Mizudashi is very straightforward. You don’t immerse the filter into water, but instead gradually pour water over the grounds once the filter is put in place. After pouring, you mix the grounds around a little.

There’s no real need for measuring. The prescribed 80g of coffee more or less reaches the top of the visible portion of the filter. You then add water until it reaches the level of the plastic neck.

Ovalware Brewing

Brewing steps are clearly outlined in the manual. They recommend weighing 85 g (3 oz) of medium to coarse ground coffee which is a little more than 80% of the filter volume. Then pour room temperature filtered water slowly over the grounds. You should stir and mix the grounds a little. Like any immersion brewer, we found brewing simple and effortless.

10

Decanting

9.0

Decanting is about as effortless as brewing. You simply pop the lid off and remove the filter. You may want to leave the filter at an angle in a glass to catch any remaining concentrate as it drips out.  

Like brewing, decanting was straightforward. As with any immersion filter, you simply lift it out of the carafe and place it in a small cup to catch the remaining liquid. The holes on the bottom of the filter make decanting fast and effortless. After decanting, we rinsed off the stopper even though there were no granules present.

Due to the amount of sediment left behind, we recommend a second decanting at the expense of a little extra work. The more health conscious may want to use a paper filter at the same time.

8.5

Cleaning and Storage

8.5

One thing the Hario Mizudashi has going for it is the practical filter design. The bottom comes off so it was very easy to clean. The slender brew decanter is too narrow and long for hand cleaning, but you can use a brush. All parts are also dishwasher safe. Once everything’s dry, store it fully assembled. Its height is the main concern when it comes to storage.

The shape of the Ovalware carafe means that you need to clean it with a bottle brush. Although slightly more effort is needed than other brewers, it’s a small compromise on a design that works comparatively well. The filter requires a bottle brush too, however, all parts can go in the dishwasher.

The Ovalware cold brew coffee maker simply stores as it is. We noted that the silicone base is an excellent design feature for safer storage. The glass doesn’t bang and the sides are protected from scratching.