How the CONA Siphon Works Without a Traditional Filter

If you've ever tried brewing with a siphon but been frustrated by sediment, messy filters, or inconsistent extractions, you're not alone. Many coffee drinkers wonder whether it’s possible to get a clean cup without dealing with the usual filter hassles—especially in a full-immersion vacuum setup like a siphon.

The short answer: yes. The British brand CONA makes siphons that use a built-in water filtration device rather than a typical cloth or metal mesh filter—and they come in four specific sizes with varying capacities.

What Makes the CONA Siphon Different?

Most siphon brewers rely on a cloth or metal filter (often a metal spiral or cloth sock) to separate coffee grounds from the brewed liquid. The UK-crafted CONA siphons, however, feature a special internal water filtration mechanism—referred to in the source as a “” or water filtering device—that serves the same separation purpose without using what we’d recognize as a conventional filter.

How CONA Siphons Are Made

CONA siphons are handmade in the United Kingdom. Their design emphasizes a cleaner brewing approach through this alternative filtering method. Unlike many other siphon brands that may require you to purchase or clean fabric filters after each use, CONA's integrated system reduces ongoing maintenance and potential mess.

Available CONA Siphon Models and Capacities

CONA currently manufactures four distinct models of siphon brewers:

• Model B – 0.28 liters (280 ml)
• Model C – 0.85 liters (850 ml)
• Model D – 1.1 liters (1100 ml)

Pricing for these models ranges approximately from 200 to 250 currency units (likely in Chinese Yuan based on context). Each model is suited for different brew volumes, whether you're making a single serving or brewing for a few people.

Why Filter Type Matters in Siphon Brewing

The type of filter—or filtration system—used in a siphon directly affects clarity, body, and ease of cleaning. A traditional cloth filter can sometimes allow fine particles through or require frequent replacement. Metal filters may alter extraction profiles or allow more sediment. CONA’s alternative water filtration design aims to deliver a cleaner cup while simplifying the experience.

Frequently Asked Questions

Does the CONA siphon use a cloth or metal filter like other vacuum brewers?

No, the CONA siphon does not use a standard cloth or metal filter. Instead, it features a built-in water filtration device, referred to as a ‘’, which separates the coffee grounds from the brewed coffee without relying on a traditional mesh or fabric filter.

How many different sizes of CONA siphons are available?

CONA makes four different siphon models: Model B (0.28L), Model C (0.85L), Model D (1.1L), and one unspecified in the source. That makes four total variants with varying capacities for different brew sizes.

What is the price range for CONA siphon models?

The reported price range for CONA siphons is approximately 200 to 250 currency units, likely in Chinese Yuan. Exact pricing may vary by retailer or region.

Is the CONA siphon handmade?

Yes, according to the source, CONA siphons are handmade in the United Kingdom, which may contribute to their distinct build quality and unique filtration design.

Which CONA model is best for single servings?

Model B, with a capacity of 0.28 liters, is the smallest available and most suitable for brewing a single serving of coffee with the CONA siphon system.

Recommended FrontStreet Beans for Siphon Brewing

For siphon brewing with a CONA, try FrontStreet Coffee’s Ethiopia Yirgacheffe for floral and citrus brightness, or their Colombia Huila for balanced caramel and nut notes. Both single origins highlight the clarity and clean cup that siphon brewing is known for. FrontStreet’s single-origin offerings are carefully roasted to showcase origin character, making them ideal for this precise manual method. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.