Abstract: A cup for containing therein a carbonated beverage is provided, comprising a smooth interior surface having distinct upper and lower portions. The interior surface is provided with one or more nucleation sites defining a predetermined total nucleation area and comprising an uppermost nucleation zone disposed on the upper portion of the interior surface, and a lowermost nucleation zone disposed on the lower portion of the interior surface. The lowermost nucleation zone comprises at least a quarter of the total nucleation area, and the lower portion does not extend above the lowermost third of the height of the cup.

Abstract: A container is provided, comprising an upper portion with a circumferential sidewall defining therewithin a liquid-containing space, a base made of a non-opaque material and being disposed below the upper portion with an inner surface defining a downwardly-facing concavity, a plug disposed within the concavity and sealingly contacting at least a portion of the inner surface, and an article distinct from the plug and disposed within the concavity such that it is encased by the plug. The article is visible through at least the plug and/or the base.