Abstract: Presented is a closure assembly and a method for opening. The closure assembly includes a body, the body defining an opening and a body locking portion, and a lid, the lid moveably affixed to the body and comprising a lid locking portion, the lid locking portion configured to engage the body locking portion to releasably lock the lid in the closed position. The closure assembly also includes a hinge, the hinge being affixed to the lid and the body, the hinge configured to move the lid from a closed position occluding the opening of the body to an open position permitting passage through the opening, the hinge further configured to urge the lid into the open position, and at least one spring member.

Abstract: A tamper evident closure employs a frangible tamper evident finger for initially retaining a lid in a closed position relative to a closure body. In response to an initial opening of the lid, the finger is separated from the lid and retained in a volume at least partly defined by the closure body. As the finger is connected to the lid by a frangible bridge in a confirmation window, upon separation of the finger from the lid, the now open confirmation window provides immediate and ready indication that the lid has been opened.