A system, comprising: a container assembly including a cap and defining a reservoir, the container assembly having a first end and a second end, the cap disposed at the first end of the container assembly; a fluid access assembly including a housing defining an interior, a fluid access component, a fluid connector component, and an engagement feature, the housing having a first end and a second end, the fluid access component extending from the first end of the housing into the interior of the housing, the fluid access component defining a lumen, the fluid connector component disposed on the first end of the housing and configured to be coupled to a patient access device such that the lumen of the fluid access component can be in fluidic communication with a patient's vasculature via the fluid connector component and the patient access device; and characterized in that the system further comprises: an adapter including a first engagement feature and a second engagement feature, the first engagement feature of the adapter configured to releasably engage with the cap of the container assembly and the second engagement feature of the adapter configured to releasably engage with the engagement feature of the fluid access assembly such that, in a first configuration in which the first engagement feature of the adapter is engaged with the cap and the second engagement feature of the adapter is engaged with the engagement feature of the fluid access assembly, the cap of the container assembly is at least partially disposed within the interior of the housing and spaced from the fluid access component. a container assembly including a cap and defining a reservoir, the container assembly having a first end and a second end, the cap disposed at the first end of the container assembly; a fluid access assembly including a housing defining an interior, a fluid access component, a fluid connector component, and an engagement feature, the housing having a first end and a second end, the fluid access component extending from the first end of the housing into the interior of the housing, the fluid access component defining a lumen, the fluid connector component disposed on the first end of the housing and configured to be coupled to a patient access device such that the lumen of the fluid access component can be in fluidic communication with a patient's vasculature via the fluid connector component and the patient access device; and characterized in that the system further comprises: an adapter including a first engagement feature and a second engagement feature, the first engagement feature of the adapter configured to releasably engage with the cap of the container assembly and the second engagement feature of the adapter configured to releasably engage with the engagement feature of the fluid access assembly such that, in a first configuration in which the first engagement feature of the adapter is engaged with the cap and the second engagement feature of the adapter is engaged with the engagement feature of the fluid access assembly, the cap of the container assembly is at least partially disposed within the interior of the housing and spaced from the fluid access component.