A closure assembly for attachment to the lid of a container for the storage and dispensing of towelettes or similar articles is constructed so as to be receivable within a preformed keyhole-shaped opening in the container lid. The assembly includes a body with a main radially extending flange larger than the opening in the lid. The lower portion of the body carries radially extending locking tabs which are dimensioned to fit through the lid opening and, upon the closure being turned, to engage the lower surface of the lid in opposed relationship with the flange which engages the upper surface. Antirotation tabs also extend radially of the lower portion of the body and again, upon rotation, engages the edges of the lid opening to thus secure the closure on the lid. A cap is also provided to releasably engage the upper portion of the closure body to provide a substantially airtight seal for the container.