welcome
Wired

Wired

Entertainment

Entertainment

The Ratio Four is a coffee maker that makes a single mug of coffee. Here’s how it works

Wired
Summary
Nutrition label

51% Informative

The Ratio Four coffeemaker is designed to solve the problem of making large batches of coffee.

The device's biggest batch measures a mere four cups, big enough for two steaming mugs.

There’s only one button, and no heating element under the carafe.

The coffee that comes from the Ratio can be astoundingly good.

Ratio’s signal technology is a showerhead that mimics the agitation of a pour-over, allowing for uncommonly full-bodied and full-flavored extraction.

The Six received SCA certification attesting to this.

The Four 's brew hovers somewhere between pour over and classic drip.

The carafe, while handsome, does not preserve temperature well.