Review: Round Cold Brew Mason Jar – Simple and Effective

If you're new to making cold brew at home, the sheer number of gadgets can feel overwhelming. Between French presses, dedicated cold brew makers, and DIY setups, it's easy to overthink the process. The Round Cold Brew Mason Jar from Chamberlain Coffee takes a refreshingly simple approach: it's a mason jar designed to do one thing well—brew smooth, rich cold brew with minimal fuss.

We spent a few weeks using it alongside our usual brewing routine to see if it lives up to the hype. Does this jar simplify your morning ritual, or is it just another kitchen gadget? Here's our honest take.

Design and Build: Simple but Thoughtful

The Round Cold Brew Mason Jar looks exactly like a classic mason jar, but with a few clever upgrades. The glass is thick and sturdy, and the lid features a built-in filter that keeps coffee grounds contained while allowing water to flow through. The filter is fine enough to prevent grit in your final brew, yet coarse enough to let the coffee steep properly.

The jar's wide mouth makes it easy to add coffee and water, and the handle—a nice touch—makes pouring and carrying comfortable, even when full. The measurements on the side are a practical addition, helping you get the right coffee-to-water ratio without a separate scale. It's a design that feels both nostalgic and modern.

• Thick glass that feels durable and retains temperature well
• Built-in fine mesh filter eliminates the need for cheesecloth or paper filters
• Measurement markings on the side simplify ratio calculations

Brewing Performance: Does It Deliver?

We brewed multiple batches using our favorite Chamberlain Coffee cold brew grounds, and the results were consistently smooth and flavorful. The jar's size is perfect for a 12-ounce concentrate, which yields about two to three servings when diluted. The steeping process was straightforward: add coffee, add water, stir, and let it sit for 12 to 18 hours.

One thing we appreciated was the filter's efficiency. After steeping, we simply lifted the filter basket out, and the remaining concentrate was free of sediment. Cleanup was a breeze—just rinse the filter and jar. Compared to a French press, this jar is easier to clean and produces a cleaner cup with less sludge.

• Produces a clean, sediment-free concentrate
• Filter basket lifts out for easy removal of grounds
• Ideal for making concentrate that can be diluted with water or milk

Versatility and Value: More Than Just Cold Brew

While the jar is marketed for cold brew, we found it versatile enough for other uses. You can use it to brew sun tea, infuse water with fruits and herbs, or even as a stylish pitcher for serving iced drinks. The handle and spout make pouring into glasses or a Transparent Tumbler effortless.

At its price point, the Round Cold Brew Mason Jar offers excellent value. It's more affordable than many electric cold brew makers and takes up less counter space. If you're looking for a simple, reliable way to make cold brew at home, this jar is a solid investment. Pair it with Chamberlain Coffee's Coconut XL Cold Brew Bags for an even easier brewing experience—just drop a bag in, add water, and steep.

• Multipurpose: great for tea, infused water, or serving drinks
• More affordable and compact than electric cold brew systems
• Works well with Chamberlain Coffee's cold brew bags for zero-mess brewing

The Round Cold Brew Mason Jar is a simple, effective tool that delivers on its promise. It's well-made, easy to use, and produces great-tasting cold brew without unnecessary complexity. If you're looking for a no-nonsense cold brew maker that won't break the bank, this jar is a worthy addition to your kitchen. Whether you're a cold brew newbie or a seasoned pro, it's a purchase you're unlikely to regret.