Embodiments of the invention include apparatus for filling containers and related methods. In an embodiment, an apparatus includes a rotary turret assembly rotatably coupled to a filler frame. The rotary turret assembly can include a rotary base and a plurality of hollow columns mounted on the rotary base and arranged in a circle. A plurality of piston assemblies can be configured to move up and down within the hollow columns. Each piston assembly can include a piston body and a top hat assembly configured to releasably engage the top of the piston body. The piston body and the top hat assembly can release from one another when a release lever is engaged. Rotation of the rotary column group causes the cam contact members of the piston assemblies to move over a surface of a cam track causing vertical movement of the top hat assemblies. Other embodiments are included herein.