Abstract: A dispenser apparatus is disclosed herein. A dispenser is disclosed herein. In various aspects, the dispenser includes a piston slidably sealingly engagable with a container containing a unit dose of liquid therein. The dispenser includes a cutting edge disposed about a piston face of the piston, the cutting edge configured to open a covering of rigid construction sealingly engaged with the container, in various aspects. A passage is formed between a piston face of the piston and a nozzle outlet of a nozzle to communicate fluid from the container through the nozzle outlet by sliding of the piston within the container, in various aspects. Methods of use of the dispenser are disclosed herein. This Abstract is presented to meet requirements of 37 C.F.R. §1.72(b) only. This Abstract is not intended to identify key elements of the apparatus and methods disclosed herein or to delineate the scope thereof.