A dispenser for use with a container of lotion or paste-like product to be dispensed. The dispenser comprises a body having an inlet port connectable to the container and a dispensing spout with a closure cap. The dispenser has a plunger assembly manually shiftable between an unactuated position and an actuated position and a piston shiftable by the plunger assembly between an unactuated position and an actuated position. Both the plunger assembly and the piston are biased toward their unactuated position. As the plunger assembly and piston are shifted toward their actuated positions, the spout cap is opened and the piston causes product to be dispensed through the spout. When the plunger assembly is released and it and the piston return to their unactuated positions, a suck back vacuum withdraws product back into said spout, a vacuum created by the piston draws product from the container into the dispenser and the spout is closed by the cap. The dispenser can be used with a collapsible container or a rigid, uncollapsible container vented by a port provided in the dispenser.