The Sarco pod (also known as Pegasos and has been referred to as a " suicide pod ") is a euthanasia device or machine consisting of a 3D-printed detachable capsule mounted on a stand that contains a canister of liquid nitrogen to die by suicide through inert gas asphyxiation.

But Sarco pods — short for sarcophagus — allow a person to control their death inside the pod by quickly reducing internal oxygen levels. The person intending to end their life is required to answer a set of pre-recorded questions, then press a button that floods the interior with nitrogen.

A coffin-shaped capsule that allows occupants to kill themselves has passed legal review in Switzerland, according to its creators. The Sarco machine can be operated from the inside –conceivably just by blinking if the person suffers from locked-in syndrome – and works by reducing the oxygen level in the pod to below a critical level.

The concept of a capsule that could produce a rapid decrease in oxygen level, while maintaining a low CO2 level, (the conditions for a peaceful, even euphoric death) was the brief behind the Sarco. When Exit was approached in 2012 for a technological solution for a UK man with Locked-in Syndrome, it was the Sarco that emerged.