A system, apparatus, and method for sampling of liquid products. The system includes a portable, releaseably connected product sample receiving assembly and a plurality of product sampling and mixing assemblies. The product sample receiving assembly can be attached and detached from two or more the product sampling and mixing assemblies, so that a single product sample receiving assembly can be used to service multiple product sampling and mixing assembly locations at different times. The product sample receiving assembly may include a slip-stream configuration or in-line configuration. The product sampling and mixing assemblies may be unidirectional or bidirectional.