Weighing 825 g, the Cafein 11 is designed to remain practical for travel. Its cylindrical body can fit easily into a backpack, while food-grade stainless steel provides a durable construction that is also straightforward to clean. More importantly, the machine can heat its own water, removing the need to carry a separate kettle. Starting with room-temperature water, it takes approximately 135 seconds to reach brewing temperature.

For extraction, the Cafein 11 operates at 20 bar of pressure and begins with an 8-second pre-infusion cycle. By allowing the coffee grounds to become saturated before applying full pressure, pre-infusion is intended to promote a more even extraction. It is a relatively small part of the brewing process, but an important one for a machine designed to reproduce espresso away from a conventional setup.

The Cafein 11 supports both coffee capsules and ground coffee. Capsules offer a quick and convenient option when time is limited, while ground coffee gives users more flexibility over their beans and brewing routine. This dual compatibility makes the machine suitable for different situations, from busy office mornings to slower weekends outdoors.

Charging is handled through USB-C, allowing the machine to use the same type of cable commonly carried for phones, laptops, and other electronics. Its battery system consists of three 4,500 mAh cells, providing enough capacity for multiple shots between charges.

Rather than simply shrinking an espresso machine, the Cafein 11 focuses on removing the equipment normally required to make espresso away from home. By integrating heating, pressure, extraction, and battery power into one compact unit, it offers a more self-contained approach to portable coffee brewing.