Drinking vessels

A two-part drinking vessel having one part adapted to be reused without requiring washing for sanitary reuse and to provide an exterior surface substantially free of condensation, said drinking vessel comprising:

• a first vessel member comprising a disposable insert member adapted to contain any desired substance such as a liquid, said insert member having a lip extending downwardly from its open top tim, said lip being proportioned to space a person's lip from said exterior surface when drinking from said drinking vessel, said insert member also including a step-like indentation generally near its bottom to form a reduced diameter portion thereat with an interior shoulder formed at said step-like indentation, said shoulder providing a support surface facing said insert top rim, said reduced diameter portion having an interior diameter, as measured generally at said interior shoulder, at least slightly less than the outer diameter at the insert bottom to permit a plurality of said inserts to be stacked, in inverted orientation, one on top of another, with the shoulder support surface on one insert abutting the next adjacent insert along a portion of its bottom surface to provide nonsticking stackability of insert members in a relatively compact stack of inserts with the shoulder support surface of one insert resting upon the bottom surface of the next insert below it when the inserts are stacked in inverted orientation;
• a reusable second vessel member adapted to receive a said insert member, said second vessel member being proportioned to provide a thermal air space between said second vessel member and said insert member when said insert member is seated within said second vessel member, said thermal air space providing insulation for any substance within said insert member to prevent condensation from building up on said exterior surface:
• and
• grasping means associated between said insert member and said second vessel member for permitting releasable engagement between said insert member and said second vessel member,
• such that when said second vessel member is thrust down onto a stack of said insert members and thereafter lifted, one said insert member is releasably grasped by said second vessel member and can be removed from said stack of insert members substantially without sticking to any other insert member in said stack yet it can be removed from said second vessel member when desired with relative ease for replacement by another said insert member by repeating said thrusting motion.

A two-part drinking vessel having one part adapted to be reused without requiring washing for sanitary reuse and to provide an exterior surface substantially free of condensation, said drinking vessel comprising:

• a first vessel member comprising a disposable insert member adapted to contain any desired substance such as a liquid, said insert member having a lip extending downwardly from its open top rim, said lip being proportioned to space a person's lip from said exterior surface when drinking from said drinking vessel, each said insert member including means permitting a plurality of insert members to be stacked, in inverted orientation, one on top of another, substantially without sticking together;
• a reusable second vessel member adapted to receive a said insert member, said second vessel member being proportioned to provide a thermal air space between said second vessel member and said insert member when said insert member is seated within said second vessel member, said thermal air space providing insulation for any substance within said insert member to prevent condensation from building up on said exterior surface;
• and
• grasping means associated between said lip of said insert member, along its interior surface, and a generally oppositely disposed surface portion of said second vessel member for permitting releasable engagement between said insert member and said second vessel member, said grasping means comprising a plurality of discrete spaced-apart, generally bead-like protuberances formed on one of said members and a ring-like ridge formed on the other of said members, said protuberances and ring-like ridge being proportioned and positioned relative to each other to releasably secure said insert member within said second vessel member, such that when said second vessel member is thrust down onto a stack of said insert members and thereafter lifted, one said insert member is releasably grasped by said second vessel member by cooperation between said proturberances and said ridge to permit removal from said stack of insert members substantially without sticking to any other insert member in said stack yet it can be removed from said second vessel member when desired with relative ease for replacement by another said insert member by repeating said thrusting motion.

A two-part drinking vessel having one part adapted to be reused without requiring washing for sanitary reuse and to provide an exterior surface substantially free of condensation, said drinking vessel comprising:

• a first vessel member comprising a disposable insert member adapted to contain any desired substance such as a liquid, said insert member having a lip extending downwardly from its open top rim, said lip being proportioned to space a person's lip from said exterior surface when drinking from said drinking vessel, each said insert member including means permitting a plurality of insert members to be stacked, in inverted orientation, one on top of another, substantially without sticking together;
• a reusable second vessel member adapted to receive a said insert member, said second vessel member being proportioned to provide a thermal air space between said second vessel member and said insert member when said insert member is seated within said second vessel member, said thermal air space providing insulation for any substance within said insert member to prevent condensation from building up on said exterior surface, said second vessel member including vent means in its bottom wall for relieving any change in pressure in said thermal air space due to the presence of a hot or cold substance in said insert member and drip means associated with said vent means to substantially prevent any condensation accumulated in said second vessel member from spilling through said vent means when a person tilts said drinking vessel to drink therefrom;
• and
• grasping means associated between the inwardly facing surface of said insert member lip and the upper exterior portion of said second vessel member for permitting releasable engagement between said insert member andsaid second vessel member, such that when said second vessel member is thrust down onto a stack of said insert members and thereafter lifted, one said insert member is releasably grasped by said second vessel member and can be removed from said stack of insert members without sticking to any other insert member in said stack yet it can be removed from said second vessel member when desired with relative ease for replacement by another said insert member by repeating said thrusting motion.

A disposable insert for use with a drinking vessel, comprising an insert member having an open top to receive liquid or other substance and being proportioned to conform generally to the configuration of a permanent container so as to be receivable within the permanent container and form a generally double-walled drinking vessel having a thermal spacing between said insert member and the permanent container for the collection of condensation forming on said insert member to provide an interior surface of the permanent container substantially free of condensation, said insert member including a lip at its top edge extending toward its bottom, said lip being proportioned to substantially prevent a person's lip from contacting the permanent container yet permit a plurality of said insert members to be stacked on top of each other, said insert also including a step-like indentation generally near its bottom to form a reduced diameter portion at the bottom of said insert, with an interior shoulder formed at said step-like indentation, said shoulder providing a support surface facing said insert top edge, said reduced diameter portion having an interior diameter, as measured generally at said interior shoulder, at least slightly less than the outer diameter at the insert bottom, to permit a plurality of said inserts to be stacked, in inverted orientation, one on top of another, with the shoulder support surface of one insert abutting the next adjacent insert along a portion of its bottom surface for substantial non-sticking stackability of inserts in a relatively compact stack of inserts with the shoulder support surface of one insert resting upon the bottom surface of the next insert below it when the inserts are stacked in inverted orientation such that when a permanent container is thrust down onto a stack of said inserts and thereafter lifted, one said insert is releasably grasped by the container and can be removed from said stack of inserts substantially without sticking to any other inserts in said stack yet it can be removed from the container when desired with relative ease for replacement by another insert by repeating said thrusting motion.