Drinking vessel having exchangeable insert or lining

Claim 2

A drinking vessel comprising an essentially rigid cup-shaped body of circular horizontal cross-sectional shape and forming an orifice portion adjacent its top edge, a thin-walled lining inserted into the body and having an orifice portion, a downwardly directed external collar extending from the orifice portion of said lining, said collar defining together with an adjacent wall part of said lining an annular groove receiving the orifice portion of said body, both of the lining wall surfaces confronting each other in said groove being in contact with the body adjacent the orifice top edge thereof, the lining constituting a cup substantially depending freely from said body top edge into the interior of the cup-shaped body, a part of the inside surface of the body and said wall part of said lining, which together with the collar defines the groove each having at least a substantially cylindrical surface portion adjacent the orifice top edge and the bottom of the groove, respectively, said cylindrical surface portion on the lining having a shorter axial length than the cylindrical surface portion located on the inside surface of said body.

Claim 3

A drinking vessel as claimed in claim 1, in which a first inwardly extending annular shoulder is formed on that wall part of the lining which together with the collar defines the groove, and at least a second inwardly extending annular internal shoulder is formed on that part of said lining below said first shoulder.

Claim 4

A drinking vessel as claimed in claim 1, in which a substantially conical surface portion is provided on the outside of the body adjacent its top edge, the cylindrical surface portion on the inside surface of the body and said conical surface portion on the outside of the body having essentially the same axial length.

Claim 5

A bowl-shaped lining having a thin wall of plastic composition, said lining being defined by a relatively long, outer frustoconical flange part and by a relatively short cylindrical sidewall part, which are connected together to form a substantially inverted U-shaped groove, said sidewall part of said lining being provided with a shoulder arrangement including two spaced apart shoulders directed toward the axis of said bowl-shaped lining, one shoulder of said lining being offset inwardly with respect to the inner face of said sidewall part of said lining, which lining sidewall part has a shorter axial length than that of said lining flange, said one lining shoulder projecting axially inwardly toward the bottom of the bowl-shaped lining thereby to reduce the diameter of the lining sidewall, the other shoulder of said shoulder arrangement being located a predetermined distance substantially parallely to and below said one shoulder and being further offset inwardly with respect to said lining sidewall, thereby to further reduce the inner diameter of said bowl-shaped lining withouT reducing the lining wall thickness, while reinforcing the lining wall.

Claim 6

A bowl-shaped lining having a thin wall of plastic composition, said lining being defined by a relatively long, outer frustoconical flange part and by a relatively short cylindrical sidewall part, which are connected together to form a substantially inverted U-shaped groove, said sidewall part of said lining being provided with a shoulder arrangement including two spaced apart shoulders directed toward the axis of said bowl-shaped lining, one shoulder of said lining being offset inwardly with respect to the inner face of said sidewall part of said lining, which lining sidewall part has a shorter axial length than that of said lining flange, said one lining shoulder projecting axially inwardly toward the bottom of the bowl-shaped lining thereby to reduce the diameter of the lining sidewall, the other shoulder of said shoulder arrangement being located a predetermined distance substantially parallely to and below said one shoulder and being further offset inwardly with respect to said lining sidewall, thereby to further reduce the inner diameter of said bowl-shaped lining withouT reducing the lining wall thickness, while reinforcing the lining wall.