A single use packing, dispensing, and rinsing technique, where a strainer element is a permanent part of the packaging, placed opposite of the primary opening, to allow a user to drain liquid contents from a container (packing fluid or user-introduced) while retaining the solid contents.

A device for puncturing a metal can having a cylindrical sidewall and a bottom portion with an annular concave central portion terminating in an annular base portion. The base has an annular inclined connecting wall portion extending outward from the annular base portion to the sidewall. The device includes a frame with vertical walls extending above a supporting surface to a height at least equal to the height of the metal can, and an arm rotatably attached to the walls. The arm has two or more puncturing elements extending downward when the arm is in a puncturing position in which the arm extends laterally. The puncturing elements are configured so the can is positionable upside-down on a supporting surface so that when the arm is rotated into the puncturing position, the first puncturing element punctures the connecting wall and the second puncturing element punctures the concave central portion.

A device for puncturing a metal can having a cylindrical sidewall and a bottom portion with an annular concave central portion terminating in an annular base portion. The base has an annular inclined connecting wall portion extending outward from the annular base portion to the sidewall. The device includes a frame with vertical walls extending above a supporting surface to a height at least equal to the height of the metal can, and an arm rotatably attached to the walls. The arm has two or more puncturing elements extending downward when the arm is in a puncturing position in which the arm extends laterally. The puncturing elements are configured so the can is positionable upside-down on a supporting surface so that when the arm is rotated into the puncturing position, the first puncturing element punctures the connecting wall and the second puncturing element punctures the concave central portion.