asobu Cold Brew Coffee Maker, Award-Winning 40oz Insulated Cold Brew Brewer with Portable Stainless Steel Carafe – No.1 Europe Coffee Fest Winner, Leakproof, BPA-Free, Keeps Cold 24H

A cold brew coffee maker that doubles as a durable travel vessel solves the messy transfer step that trips up so many morning routines. The Asobu brewer is built around a two-piece stacking system: a clear steeping chamber sits directly over a portable, vacuum-insulated carafe. Instead of steeping grounds in a bulky glass pitcher and transferring the liquid into a separate travel mug, you brew directly into a system designed for immediate transport. This setup appeals directly to commuters, office workers, and outdoor enthusiasts who want fresh, chilled coffee ready to travel without extra dishes.

The steeping process relies on cold water, coarse coffee grounds, and extended steeping time to extract smooth coffee concentrate. Because cold extraction bypasses high heat, the resulting brew delivers clarity and natural richness with substantially less bitterness than traditional hot brewing. The concentrate you produce offers versatile daily use, allowing you to dilute it over ice with milk or water, or mix it with hot water when you prefer a warm mug of smooth coffee.

Temperature retention is where the hardware stands out. The 40-ounce stainless steel carafe features copper vacuum insulation, engineered to keep your coffee cold for up to 24 hours. Because the carafe is built to be 100% leakproof, you can seal it and toss it into a backpack or passenger seat without worrying about accidental spills during transit. The upper 32-ounce brewing chamber is molded from clear, food-grade Tritan, giving you durable, BPA-free construction that resists daily wear without the fragility of standard glass pitchers.

The primary design trade-off centers on vertical footprint and capacity differences. Standing at 14 inches tall with a 5.39 by 5.39 inch base, the stacked unit requires adequate vertical clearance on your countertop or in your refrigerator during the brewing cycle. Additionally, the brewing chamber holds 32 ounces while the lower carafe holds 40 ounces, meaning a single brew run creates coffee concentrate rather than completely filling the insulated vessel to its brim without dilution.

Verdict: For commuters, campers, and iced coffee drinkers seeking a durable, portable cold brew coffee maker with exceptional 24-hour temperature retention, the Asobu system delivers outstanding convenience. Those who only brew large batches for home countertop dispensers or need an ultra-compact refrigerator footprint may want to consider a different format.

• Carafe Capacity: 40 oz
• Brewing Chamber Capacity: 32 oz
• Dimensions: 5.39 x 5.39 x 14 inches
• Carafe Material: Stainless steel with copper vacuum insulation
• Brewing Chamber Material: Clear Tritan
• Safety Features: BPA-free, food-grade materials
• Cold Retention: Up to 24 hours
• Seal: 100% leak-proof portable lid

A great fit if you:

• Need an insulated stainless steel carafe that reliably keeps your iced coffee cold for up to 24 hours on long workdays.
• Commute frequently to work, school, or the gym and require a verified 100% leakproof portable container that avoids messy bag spills.
• Prefer the smooth, low-bitterness profile of cold water coffee concentrate that can be served either iced or hot.
• Want durable, BPA-free Tritan brewing materials rather than fragile glass containers that can easily chip or crack.

Consider something else if you:

• Require a compact, low-profile brewing vessel that fits underneath very tight refrigerator shelves with less than 14 inches of clearance.
• Want an extra-large home brewing system capable of making more than 32 ounces of concentrate in a single steeping batch.

Confirm on the listing:

• Measure your refrigerator shelf height and kitchen cabinet clearance to confirm they comfortably accommodate the 14-inch total height and 5.39-inch square base.
• Check the product listing details to confirm whether a cleaning brush or specific filter basket accessories are included in the packaging.
• Review the manufacturer guidance regarding dishwasher compatibility versus recommended hand-washing steps for the insulated copper carafe and Tritan chamber.
• Verify which lid components are included for both the brewing stage and the on-the-go travel configuration.

How to compare your options: Focus on cold retention capability, vessel materials, and overall portability when weighing cold brewers. While basic glass carafes stay stationary on your counter, this model pairs a shatter-resistant Tritan brew chamber with a copper-insulated stainless steel travel bottle. Weigh whether you value an all-in-one portable solution over standard stationary pitchers.

Following the manufacturer's suggested steeping methods ensures rich flavor and reliable operation every time you brew:

• Use coarse coffee grounds with cold water in the 32-ounce Tritan brewing chamber, allowing ample steeping time for proper extraction of rich concentrate.
• Ensure the carafe is properly aligned beneath the upper brewing section before releasing your finished coffee concentrate into the lower chamber.
• Screw the leakproof lid securely onto the 40-ounce stainless steel carafe before tossing it into your car, work bag, or gym pack.
• Enjoy the resulting concentrate straight over fresh ice cubes, dilute it with water or milk, or mix it with steaming water for hot coffee.
• Rinse the food-grade Tritan components and copper vacuum carafe promptly after each use according to package care instructions to keep flavors clean.

How long will this carafe keep coffee cold?
The stainless steel carafe utilizes copper vacuum technology to keep your cold brew chilled for up to 24 hours.

Can I use this system to make hot coffee?
Yes. The brewer produces a rich coffee concentrate through cold extraction that can easily be mixed with hot water to enjoy warm coffee without bitter notes.

What are the brewing capacities of the components?
The clear Tritan brewing chamber holds up to 32 ounces, while the insulated portable stainless steel carafe holds up to 40 ounces.

Is the travel carafe safe to carry in a backpack?
Yes, the carafe is designed to be 100% leakproof, lightweight, and durable, making it safe for transport to the office, gym, park, or in your vehicle.

What materials are used to make this coffee maker?
The system is constructed with a durable, clear Tritan brewing chamber and a stainless steel insulated carafe, utilizing food-grade, BPA-free materials throughout.