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Oster BLSTPB-WBL vs KOIOS 850W Bullet Side-by-Side Comparison

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Oster My Blend

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Koios Pro 850W Bullet

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Oster BLSTPB-WBL vs KOIOS 850W Bullet: How to Choose When Both are Quiet Good?

Overall Verdict

Both these models are good single-serve blenders considering their affordable price. Although the KOIOS 850W Bullet was slightly more efficient within our testing, we concluded the Oster BLSTPB-WBL is  strong enough for any simple  blending. 

However, these two blenders are not without their drawbacks. Their power ratings were too weak to handle the heavy blending performance well, sometimes requiring a few shakes in order to ensure a thorough blend. Nevertheless, these shortcomings are compromises for the low cost.

There's no clear winner in terms of overall design, as both blenders are quite good-looking with standard plastic parts, but we do prefer the Oster’s appearance for its sporty style, which at first glance is uncluttered and aesthetically pleasing.

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Pros & Cons

  • It is affordable but better than its competitors at blending frozen fruits.
  • The light-duty motor works consistently for basic tasks like making smoothies, protein shakes, whole-food sauces, and more. 
  • Its usability allows for an enjoyable blending experience. 
  • There is a built-in, resettable fuse, which will revive the motor in 15 minutes if it overheats.
  • Competitive price tag 
  • Extra extractor blade for dry blending 
  • Powerful motor allows for a wide range of tasks 
  • Two blending cups are included 
  • Intuitive to use 
  • The blades can be removed from the base for thorough cleaning
  • The blending jar is somewhat difficult to clean due to its narrow design.
  • The small circumference of the jar’s opening makes adding powders and fruits quite messy. 
  • This blender is not ideal for quick fibrous meals.
  • No option for hands-free operation

Key Specs

Dimension
H14.5 x W5.5 inches
H12.2 x W5.5 inches
Weight
2.6 lbs (1.2 kg)
2.9 lbs (1.3 kg)
Number of speeds
1
1
Pulse/Turbo option
No
No
Dishwasher-safe wand
Yes
Yes
Accessories
A to-go lid
4 lids, an extra blade assembly, a cleaning brush, two extra blending cups

Where to Buy

Price at publication
$33.17
$60.22
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Analysis and Test Results

Performance

Overall Performance Scoring
3.9
7.1

Protein Shake

5.2
9.2
Oster BLSTPB-WBL Protein Shake Video
A batch of protein shake prepared by the Oster Myblend Single-Serve Blender is checked for smoothness by being drained through a stainless steel mesh strainer, with a smartphone displaying the total blending time (2 minutes and 50 seconds) next to it.
Using a spoon to scoop a small smattering of dried blueberry chunks from a mesh strainer containing protein shake produced the Oster Single-Serving Blender.
KOIOS 850W Bullet Protein Shake Video
A batch of protein shake packed with dried blueberries, oatmeal, and almonds prepared by the KOIOS Bullet Personal Blender is checked for smoothness by being drained through a stainless steel mesh strainer, with a smartphone displaying the total blending time (56 seconds) next to it.
A couple of unblended almond chunks of the KOIOS Bullet being scooped from the mesh strainer with a stainless steel spoon.
Blending Time
2 mins 50 secs
56 secs
Result
Coarse
Smooth

Frozen Fruit Smoothie

6.0
8.0
Oster BLSTPB-WBL Frozen Fruit Smoothie Video
To check for solid chunks, after finishing blending, the fruity smoothie made by the Oster Myblend personal blender is spread throughout a white paper.
A spoon of fruity smoothie packed with blueberries, blackberries, strawberries, and mango made by the Oster portable blender with a smartphone displaying the total blending time ( 1 minute and 40 seconds) next to it.
KOIOS 850W Frozen Fruit Smoothie Video
To check for solid chunks, after finishing blending, the fruity smoothie made by the KOIOS Bullet single-serve blender is spread throughout a white paper with a smartphone displaying the total blending time ( 1 minute and 20 seconds) next to it.
A spoon of fruity smoothie packed with blueberries, blackberries, strawberries, and mango made by the KOIOS Bullet Blender.
Blending Time
1 min 40 seconds
1 min 20 seconds
Result
Smooth
Silky Smooth
Suction

Fibrous Greens

0.0
5.0
Oster BLSTPB-WBL Fibrous Greens Video
A glass of water with fibrous greens pulp produced by the Oster Single-Serve Blender.
KOIOS 850W Fibrous Greens Video
A glass of water with fibrous greens pulp produced by the KOIOS Bullet Single-Serve Blender.
A glass of water with fibrous green pulp produced by the KOIOS Bullet Personal Blender sinking from its top to bottom.
Blending Time
20 seconds
20 seconds
Result
Very Coarse
Very Coarse

Crushed Ice Cubes

0.0
0.0
Oster BLSTPB-WBL Crushed Ice Video
A black tray of crushed ice produced by the Oster Smoothie Maker Blender being on a table.
The amount of unblended ice cubes (3.91 oz) of the Oster Myblend single-serve blender displayed on a scale’s screen.
KOIOS 850W Crushed Ice Video
A black tray of crushed ice produced by the KOIOS Personal Blender being on a table.
The amount of unblended ice cubes (4.61 oz) of the KOIOS Bullet single-serve blender displayed on a scale’s screen.
Ice Fineness
Chunky
Coarse
Unblended Ice
65% of 6 oz
77% of 6 oz

Design

Overall Design Scoring
6.6
8.3

In the Box

The Oster Myblend personal blender lying on a table with its additional accessories, including a to-go lid, user guide, and paper carton box.
The KOIOS Bullet personal blender lying on a table with its accessories, including two lids, two additional blending cup with lids, a paper carton box, an additional blade assembly, a cleaning brush, and a user guide.

Dimensions

The Oster Myblend personal blender standing on a gray table, with the length of its motor base being noted to the side as 7.5 inches, and the total length and width of the unit as 14.5 inches and 5.5 inches, respectively.
Koios Pro 850W Bullet Personal Blender standing on a gray table, with the length of its motor base being noted to the side as 7.2 inches, and the total length and width of the unit as 12.2 inches and 5.5 inches, respectively.
Height
14.5" (36.8 cm)
12.2" (31.0 cm)
Width
5.5" (14.0 cm)
5.5" (14.0 cm)
Weight
2.6 lbs (1.2 kg)
2.9 lbs (1.3 kg)
Length
Shaft Length

Build Quality

7.0
8.0
The motor base and blending cup with blade assembly attached of the Oster single-serve blender.
The motor base and blending cup of the KOIOS Bullet single-serve blender lying side by side on a gray table.

Blades

7.0
7.5
A close-up of the blade assembly featuring 4 stainless steel prongs of the Oster small blender.
A close-up of the flat blade assembly featuring 2 prongs of the KOIOS Bullet personal blender.
A close-up of the flat blade assembly featuring 2 prongs of the KOIOS Bullet personal blender.
A close-up of the blade assembly featuring 4 prongs of the KOIOS Bullet personal blender.
Material
Stainless Steel
Stainless Steel
Type
Cross
Flat and Cross
Guard Material
Blade Count
4 blades
(Flat) 2 blades, (Cross) 4 blades
Removable
No
Yes
Dishwasher Safe
Yes
No

Motor Base

The motor base of the Oster personal blender standing on a white table.
The motor base of the Oster personal blender standing on a white table.
A close-up of the Oster personal blender motor base.
A close-up of the underside of the Oster’s motor base.
A close-up of the power cord sporing a 2-plug in the underside of the Oster’s motor base.
The motor base of the KOIOS Bullet personal blender standing on a white table.
The motor base of the KOIOS Bullet personal blender standing on a white table.
A close-up of the motor base of the KOIOS Bullet personal blender.
Rated Voltage
120 V
120 V
Rated Power
250 Watts
850 Watt
Working Time
N/A
≤ 1 minute
Protection
Yes
No
Weight
2.2 lbs (1.0 kg)
2.4 lbs (1.1 kg)
Cord Length
2.1 ft (0.6 m)
4.1 ft (1.2 m)
Extra Feature
Handle
suction feet, ventilation holes

Blending Cup

5.0
10
The blender cup of the Oster Myblend personal blender standing on a table with dimension measurements written to the side (4x9x3.2 inches).
Three blending cups of the KOIOS Bullet on a table, with dimension measurements written to the side. The first cup is measured 3.4x4x2.2 inches, second cup is 3.4x6.5x2.2 inches, third cup is 3.4x6.5x2.2 inches.
Three blending cups of the KOIOS Bullet on a table, with dimension measurements written to the side. The first cup is measured 3.4x4x2.2 inches, second cup is 3.4x6.5x2.2 inches, third cup is 3.4x6.5x2.2 inches.
The blending cup of the KOIOS Bullet personal blender standing on a table with dimension measurements written to the side (3.4x4x2.2 inches).
The blending cup of the KOIOS Bullet personal blender standing on a table with dimension measurements written to the side (3.4x6.5x2.2 inches).
Material
Plastic
Plastic
Capacity
20 oz
10 oz, 17 oz, and 17 oz
Weight
0.3 lbs (0.1 kg)
0.2 lb, 0.23 lb, and 0.34 lb
Dishwasher Safe
Yes
Yes
Measurement
No
No
Suitable For
Small batches
Small batches
Accessories
To-go lid
two spout lids, one flat-top lid, one sieve lid

Speed and Controls

Someone is measuring the noise level of the Oster personal blender with the noise meter (86.1 dB).
Someone is measuring the noise level of the KOIOS personal blender with the noise meter (96.9 dB).
Activation
Twist
Push
Min Speed
N/A
N/A
Max Speed
22,216 RPM
22,648 RPM
Presets
No
No
Noise Level
86 dB
97 dB
Digital Display
No
No
Pulse Mode
No
No

Usability

Overall Usability Scoring
7.0
7.3

Hands-Free Operation

6.5
5.7

Assembly

7.5
10

Cleanability

8.0
9.5