Vacuum canister

A vacuum canister comprising:

• a container having an open top;
• a lid joined with said open top of said container and provided with a large cavity having centrally in a bottom thereof a retaining hole which is provided peripherally with a plurality of ventilation holes;
• a soft disk member having a disk portion and a retaining column engageable with said retaining hole of said large cavity of said lid, said disk portion intended for covering said ventilation holes of said retaining hole;
• and
• a suction unit fastened to said lid and provided with a lever and a suction block, said lever being fastened pivotally at one end thereof to said lid and provided at a midsegment thereof with said suction block pivoted thereto, said lever further being provided at another end thereof with a hand grip, said suction block comprising a rod fastened pivotally at one end thereof to said lever and provided at another end thereof with a piston slidable along a wall surface of said large cavity, said piston provided peripherally with a circular groove dimensioned to receive therein a sealing ring, said piston further provided in an edge of an upper surface thereof with at least one indentation;
• wherein said large cavity is provided on a top edge thereof with a circular wall having on an outer surface thereof a plurality of male threads engageable with female threads of a sealing cover which is provided centrally with an insertion hole engageable with said suction block.