Asobu Insulated Portable Brewer KB900 coffee maker

This Asobu manual cold brew coffee maker has:

  • insulated stainless steel carafe
  • claimed capacity of 40 oz.


The Asobu Insulated Portable Brewer KB900 is part of the Coffee maker test program at Consumer Reports. In our lab tests, Coffee maker models like the Insulated Portable Brewer KB900 are rated on multiple criteria, such as those listed below.

Convenience: Reflects ease of assembling and use. For the automatic brewers, we also judged the clarity of the controls.

Ease of cleaning: Reflects the ease of removing coffee grinds, cleaning the basket and the carafe.

Taste: Based on judgment by coffee expert, using medium and dark roast coffee grounds. Coffee to water ratio and dilution ratio followed the manufacturers’ suggested recipe. Taste may vary by adjusting coffee, time and water usage for a weaker or stronger brew.


Dishwasher safe Dishwasher safe All or some removable parts can be put into the dishwasher.
Carafe material Carafe material Typically made of glass, but some models may be plastic or insulated stainless steel carafe.
insulated stainless steel


Claimed capacity (oz.) Claimed capacity Capacity as listed on the product or packaging, converted to ounces.
Claimed stay fresh period (days) Claimed stay fresh period Per claimed, the number of days the brewed coffee can stay fresh in the refrigerator.
Brew time Brew time For the manual models, the time indicated is the brew time recommended by the manufacturer. For the automatic models, the values listed are preset times depending on the various settings selected.
12-24 hr.
Exterior height (in.) Exterior height Our measurement, rounded up to the nearest inch.
Exterior width (in.) Exterior width Our measurement, rounded up to the nearest inch.
Exterior depth (in.) Exterior depth Our measurement, rounded up to the nearest inch.