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A cartridge for forming a beverage includes a container defining an interior space, a filter, a beverage medium contained in the interior space, and a filter guard. The filter may be arranged so that liquid that interacts with the beverage medium flows through the filter to exit the interior space.

A cartridge for forming a beverage includes a container defining an interior space, a filter, a beverage medium contained in the interior space, and a filter guard. The filter may be arranged so that liquid that interacts with the beverage medium flows through the filter to exit the interior space. The container may include a surface arranged to be pierced by a piercing member to permit beverage to exit the container. The filter guard may be arranged to contact the piercing member to resist damage to the filter when the container surface is pierced. In one embodiment, the filter guard and filter may be in contact with the container surface that is pierced, yet damage to the filter that might be caused by the piercing element may be avoided.

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1. A cartridge for use in forming a beverage, the cartridge comprising: a container defining an interior space having first and second portions, the container having a surface arranged to be pierced by a piercing element to permit a beverage to exit the interior space and the container having a bott

1. A cartridge for use in forming a beverage, the cartridge comprising: a container defining an interior space having first and second portions, the container having a surface arranged to be pierced by a piercing element to permit a beverage to exit the interior space and the container having a bottom;a beverage medium arranged to interact with liquid introduced into the container to form a beverage, the beverage medium being located in the first portion of the interior space;a filter at least partially located in the interior space, the filter being arranged so that liquid that interacts with the beverage medium in the first portion of the interior space must flow through the filter to pass to the second portion of the interior space; anda filter guard disposed in the interior space, the filter guard having first and second extension portions positioned between the surface and a portion of the filter, each of the first and second extension portions being configured to contact a piercing element that pierces the bottom of the container within the surface to permit a beverage to exit the interior space, move within the interior space to displace the filter upon contact with the piercing element, and resist damage to the filter by the piercing element, each of the first and second extension portions having an attached portion that is attached to the container and a movable portion arranged to move relative to the attached portion with contact of the piercing element, the first extension portion being arranged to remain stationary relative to the container when the movable portion of the second extension portion moves with contact with the piercing element. 2. The cartridge of claim 1, wherein the container has an opening that is closed by a lid arranged to be pierced by a second piercing element to permit liquid to be introduced into the first portion of the interior space. 3. The cartridge of claim 1, further comprising a rim arranged around an opening and a sidewall extending from the rim. 4. The cartridge of claim 3, wherein the filter is attached to the rim or sidewall. 5. The cartridge of claim 1, wherein the filter defines a cup shape in which beverage medium is received. 6. The cartridge of claim 1, wherein the filter guard is arranged to displace and deform the filter upon contact with a piercing element such that a portion of the filter above the piercing element is displaced to a greater height above the bottom than a portion of the filter located above a part of the container surface that is not pierced by the piercing element. 7. The cartridge of claim 1, wherein at least a portion of the filter adjacent the filter guard is in contact with the filter guard. 8. The cartridge of claim 1, wherein the surface arranged to be pierced by a piercing element includes an annular area of a bottom of the cartridge, and the filter guard is arranged to contact a piercing element and resist damage to the filter when the container surface is pierced in any part of the annular area. 9. The cartridge of claim 1, wherein the first and second extension portions extend radially. 10. The cartridge of claim 3, wherein the filter guard is attached to the bottom of the container. 11. The cartridge of claim 1, wherein a central portion of the filter guard is attached to the container, and the movable portion of each of the first and second extension portions are located radially outwardly from the attached portion of each of the first and second extension portions. 12. The cartridge of claim 1, wherein the attached portion of each of the first and second extension portions is attached to the container by being integrally molded with the container. 13. The cartridge of claim 1, wherein the attached portion of each of the first and second extension portions is attached to the container by an adhesive. 14. The cartridge of claim 1, wherein the first and second extension portions are configured to bend when contacted by a piercing element. 15. The cartridge of claim 1, wherein the first and second extension portions comprise flaps. 16. The cartridge of claim 1, wherein the first and second extension portions each have a petal shape. 17. The cartridge of claim 1, wherein the first and second extension portions comprise baffles. 18. The cartridge of claim 5, wherein each of the first and second extension portions is configured to move within the interior space to displace and deform the cup shape of the filter upon contact with the piercing element. 19. The cartridge of claim 1, wherein the filter guard has a third extension portion. 20. A method of manufacturing a cartridge for use with a beverage brewing machine, comprising: providing a filter, a filter guard and a container, the container having an interior space and a surface at a bottom of the container arranged to be pierced to allow a beverage to exit the interior space;inserting at least a portion of the filter in the interior space of the container;inserting the filter guard in the interior space of the container; andproviding a beverage medium in a first portion of the interior space to interact with liquid introduced into the first portion of the interior space to form a beverage that flows through the filter toward a second portion of the interior space, the filter being arranged such that liquid that interacts with the beverage medium in the first portion of the interior space must flow through the filter to pass to the second portion of the interior space;wherein the filter guard has first and second extension portions positioned between the surface and a portion of the filter, each of the first and second extension portions being configured to contact a piercing element that pierces the bottom of the container within the surface to permit a beverage to exit the interior space, move within the interior space to displace the filter upon contact with the piercing element, and resist damage to the filter by the piercing element, each of the first and second extension portions having an attached portion that is attached to the container and a movable portion arranged to move relative to the attached portion with contact of the piercing element, the first extension portion being arranged to remain stationary relative to the container when the movable portion of the second extension portion moves with contact with the piercing element. 21. The cartridge of claim 20, wherein the filter defines a cup shape in which beverage medium is received, and wherein each of the first and second extension portions is configured to move within the interior space to displace and deform the cup shape of the filter upon contact with the piercing element. 22. The cartridge of claim 20, wherein the filter guard has a third extension portion.