A container and a container engaging member. The container engaging member may include a sample holder or reservoir, a filtration element and collar. In the assembled condition, the sample holder or reservoir is upstream of the filtration element, the container is downstream of the filtration element, and the sample holder or reservoir is attached to the container. The container engagement member is engageable and disengageable from the bottle or container in a quick attach, quick release manner, such as with only a 90 degree, ¼ turn. A tactile and/or audible indication that the engagement is complete is provided.