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Hario Mizudashi vs Ovalware Side-by-Side Comparison

Hario Mizudashi cold brew coffee maker vs Ovalware. A flawed design with poor brew quality vs a top choice for an immersion filter brewer.

By ·Updated

Hario Mizudashi

Ovalware Cold Brew

Hario Mizudashi vs Ovalware Side-by-Side Comparison

Overall Verdict

Ranking by
OverallScore Brew Quality50% Design15% Ease of Use35% ScoreOverall 50%Brew Quality 15%Design 35%Ease of Use Hario MizudashiOvalware Cold Brew7.76.57.29.78.57.89.09.3
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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.

Pros & Cons

  • Attractive brew decanter
  • Easy-to-clean filter
  • Color choice
  • Hot or cold brewing
  • Brew quality
  • Brew markers in cups and ml
  • Silicone base pad
  • Comfortable handle
  • Ease of brewing
  • Not airtight
  • Odor contamination
  • Poor brew quality
  • Quality and fit of silicone seals
  • Additional decanting
  • Narrow head for cleaning

Key Specs

Brewer HxW
11.5 x 5.4 inches
8 x 5.4 inches
Brewer Diameter
3.7" (9.4 cm)
4.7" (11.9 cm)
Brewer Materials
Glass, polypropylene plastic
Borosilicate glass, silicone
Filter Type
Plastic, nylon immersion
Stainless steel immersion
Filter HxDia
6.5 x 3.3 inches
6.9 x 2.7 inches
Decanter Weight
0.9 lbs
1 lbs

Where to Buy

Price at publication
$21.39
$31.61

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Analysis and Test Results

Brew Quality

Overall Performance Scoring
6.5
7.8

Bouquet

7.0
7.5

Drinkability

6.0
8.0
A glass with a small quantity of straight coffee standing in front of a cold coffee brew carafe.
A glass with a small quantity of straight coffee standing in front of a cold coffee brew carafe.
A visual sample of some cold brewed coffee in a glass cup with the penetrating light indicating the brew strength.
The Ovalware cold brew coffee maker with a freshly produced cold brew and an empty glass to the left.

Sediment

8.0
7.5
A close up view of sediment left over in a long glass brew carafe of a cold brew coffee maker.
A view of sediment left behind after all coffee has been carefully decanted from a typical cold brew coffee maker.

Design

Overall Design Scoring
7.2
9.0

In the Box

The unboxed Hario Mizudashi cold brew coffee maker with the box to the left and the user guide to the right.
The unboxed contents of the Ovalware RJ3 cold brew coffee maker: the box, the glass carafe with the filter, and user manual.

Decanter

A full view of the tall glass Hario Mizudashi cold brew coffee carafe.
Ovalware RJ3 cold brew coffee maker empty glass carafe with no filter and the stopper resting to the right on the countertop.
Height with Stopper Lid
11.5
8
Base Diameter
3.7
4.7
Width
5.4" (13.7 cm)
5.5" (14.0 cm)
Weight
15.0 oz (425 g)
17.3 oz (490 g)
Material
 heat-resistant glass, polypropylene plastic
borosilicate glass

Stopper / Lid

7.0
9.0
A close up view of a plastic lid standing next to the base of a tall glass carafe.
The stainless steel stopper with a rubber silicone ring resting on its side on a wooden countertop.
Diameter
3.7 in (95 mm)
3
Material
polypropylene plastic
stainless steel
Additional Features
N/A
silicone seal

 Filter

6.0
9.0
A small plastic and nylon cold brew coffee filter with a detachable base for easy cleaning.
A typical stainless steel immersion filter used in a cold brew coffee maker or tea infuser.
Length
6.5 in (165 mm)
6.9" (17.5 cm)
Diameter
3.3 in (85 m)
2.7
Material
polypropylene frame, polyester resin
lasered stainless steel
Additional Features
detachable base
silicone seal

 Build Quality

9.0
9.0
The Hario Mizudashi cold brew coffee carafe resting horizontally and separated into 4 parts.
The Ovalware JR3 cold brew coffee maker completely disassembled. There are 6 parts in total.

Usability

Overall Usability Scoring
9.7
9.3

 Brewing

10
10
A cold brew coffee immersion filter next to a kitchen scale with a bowl of 80g of coffee grounds measured.
The Ovalware RJ3 cold brew coffee maker set up to brew with the filter on a scale and a carafe of filtered to the far right.

Decanting

10
9.0

Cleaning and Storage

8.5
8.5

Behind the Comparison

Headshot of Roger Shitaki
Roger ShitakiReviewer

Roger Shitaki is a writer, author, and editor. His niches are household appliances, health & wellness, and travel. He’s a freelance contributor to a Tokyo lifestyle website and a leading ophthalmology magazine in Asia.

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