Capsule, device and method for preparing a beverage by extraction

A capsule for preparing beverages, comprising:

• a housing at least partially filled with a substance to be extracted and/or dissolved, wherein the housing is provided with a supply side for pressing a liquid such as water into the capsule, and with a discharge side located a distance from the supply side for discharging liquid containing extract and/or dissolved substance and guided through the capsule, wherein the supply side and/or the discharge side of the housing is initially sealed by a foil;
• a laterally protruding engaging edge connected to the housing to enable clamping of the capsule in a capsule holder of a device for preparing beverages;
• and
• at least one annular resilient sealing element arranged at least on the engaging edge and/or the housing for sealing a space between the capsule holder and the capsule during clamping of the capsule in the capsule holder, wherein at least one absorption cavity is formed by an annularly extending groove and is wholly enclosed by at least the sealing element.