Closures and vessels with closures

Abstract

A closure can close an outlet of a vessel. The vessel outlet can comprise a tubular cavity with an interior surface. The closure can comprise a male portion comprising a distal undersized portion, a proximal oversized portion, and a taper between the undersized and oversized portion. The male portion can be inserted in the vessel outlet, undersized portion first. Interference between the inner diameter of the vessel outlet and the outer diameter of male portion can occur when the male portion is sufficiently inserted. The interference can cause the undersized portion to flare out and engage the interior surface of the tubular cavity, thereby providing a seal.

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         21 . An apparatus comprising:
 a vessel comprising an outlet that comprises:
 a rim; 
 a first outlet portion extending from the rim to a second outlet portion and comprising a first inner diameter; 
 the second outlet portion extending from the first outlet portion to a third outlet portion and comprising a decreasing inner diameter; and 
 the third outlet portion extending from the second outlet portion and comprising a second inner diameter that is smaller than the first inner diameter; and 
   a closure for the vessel comprising:
 a base portion; and 
 a male portion that extends from the base portion, that forms a cavity, and that comprises:
 a first male portion extending from the base portion to a second male portion and comprising a first outer diameter; 
 the second male portion extending from the first male portion to a third male portion and comprising a decreasing outer diameter; and 
 the third male portion extending from the second male portion and comprising a second outer diameter that is smaller than the first outer diameter, 
 
   wherein the first male portion is longer than the first outlet portion.   
     
     
         22 . The apparatus of  claim 21 , wherein the first inner diameter is no larger than the first outer diameter, and
 wherein the second inner diameter is no larger than the second outer diameter.   
     
     
         23 . The apparatus of  claim 21 , wherein when the male portion is disposed in the outlet with the closure closing the vessel:
 at a first location, a first outer surface of the first male portion contacts a first interior surface of the first outlet portion;   at a second location, a second outer surface of the second male portion contacts a second interior surface of the second outlet portion;   at a third location, a third outer surface of the third male portion contacts a third interior surface of the third outlet portion;   at a fourth location that is disposed between the first location and the second location, a first annular gap is formed between the first outer surface of the first male portion and the first interior surface of the first outlet portion; and   at a fifth location that is disposed between the second location and the third location, a second annular gap is formed between the third outer surface of the third male portion and the third interior surface of the third outlet portion.   
     
     
         24 . The apparatus of  claim 23 , wherein the first location comprises a first seal, the second location comprises a second seal, and the third location comprises a third seal. 
     
     
         25 . The apparatus of  claim 23 , wherein said contact of the second outer surface with the second interior surface at the second location comprises deformation that comprises:
 radial expansion of the third male portion adjacent the third location; and   radial contraction of the first outlet portion adjacent the first location