Waste disposal system having a slider

A waste disposal pail comprising:

• a bottom drum to enclose a waste liner;
• a lid insert disposed on top of the bottom drum;
• a slider slidingly engaged with said lid insert to slide in a vertical direction between a first position and second position, said slider has a bottom-most portion to make abutting contact with the waste liner while said slider is moving from said first position to said second position;
• wherein the waste liner has a neck region that defines a passage, and when said neck region is twisted thereby applies a tension force to shut closed said passage, said slider is at said first position and wherein said bottom-most portion of the slider remains disposed above said passage;
• wherein when said neck region of the waste liner is untwisted to release said tension force, said slider moves vertically downward into said second position and into said passage of the waste liner to pry and/or keep said passage open;
• wherein said first position is vertically higher than said second position.