Abstract: A fluid reservoir configured to attach to a pump head is disclosed. The fluid reservoir may include an attachment configured to engage with a pump head socket. The attachment may include threads at an attachment outer surface portion. The fluid reservoir may further include a fluid reservoir outer body and a fluid reservoir inner body. The fluid reservoir outer body may have an interior surface and an exterior surface, and the fluid reservoir inner body may be disposed at the interior surface. The fluid reservoir inner body may be configured to store fluid. The fluid reservoir outer body and the fluid reservoir inner body may form a single piece fluid reservoir. The fluid reservoir inner body may be configured to expand longitudinally when the fluid is filled in the fluid reservoir inner body and collapse longitudinally when the fluid is dispensed from the fluid reservoir inner body.

Abstract: A fluid reservoir configured to attach to a pump head is disclosed. The fluid reservoir may include an attachment configured to engage with a pump head socket. The attachment may include threads at an attachment outer surface portion. The fluid reservoir may further include a fluid reservoir outer body and a fluid reservoir inner body. The fluid reservoir outer body may have an interior surface and an exterior surface, and the fluid reservoir inner body may be disposed at the interior surface. The fluid reservoir inner body may be configured to store fluid. The fluid reservoir outer body and the fluid reservoir inner body may form a single piece fluid reservoir. The fluid reservoir inner body may be configured to expand longitudinally when the fluid is filled in the fluid reservoir inner body and collapse longitudinally when the fluid is dispensed from the fluid reservoir inner body.

Abstract: A fluid reservoir configured to attach to a pump head is disclosed. The fluid reservoir may include an attachment configured to engage with a pump head socket. The attachment may include threads at an attachment outer surface portion. The fluid reservoir may further include a fluid reservoir main body having a proximal portion and a distal portion. The proximal portion may be connected to the attachment and the distal portion may include a first sealed seam. The fluid reservoir main body may be flexible and configured to dispense fluid from the fluid reservoir when a negative pressure is applied to a fluid reservoir interior side. An attachment diameter may be equal or equivalent to a proximal portion diameter.