PROBLEM TO BE SOLVED: To provide a safe and hygienic nipple member which can be easily attached to a bottle can, a beverage container provided with the nipple member, and a cap with a nipple. SOLUTION: The whole is formed of an elastic material into a substantially conical shape and can be attached to a mouth portion 3 of a container body 2, and is continuous with a nipple portion 4 having an opening 4a formed at the tip portion and a nipple portion. The areola portion 5 is formed and has a diameter larger than that of the nipple portion, and the base portion 6 which is continuously formed in the areola portion and has a diameter larger than that of the areola portion is provided, and the base portion is the upper end portion of the mouth portion. The curl portion 3a formed by folding the is outward has a fitting recess 6a into which the curl portion 3a can be fitted. [Selection diagram] Fig. 1【課題】 ボトル缶への装着が容易であり、安全で衛生的な乳首部材及びこれを備えた飲料容器並びに乳首付きキャップを提供すること。【解決手段】 全体が弾性材料で略円錐状に成形されていると共に容器本体２の口部３に取り付け可能であり、先端部に開口部４ａが形成された乳首部４と、乳首部に連続して形成され乳首部よりも拡径された乳輪部５と、乳輪部に連続して形成され乳輪部よりも拡径された基部６とを備え、基部が、口部の上端部を外側に折り返して形成されたカール部３ａが嵌め込み可能な嵌め込み用凹部６ａを有している。【選択図】 図１
