A Box of smile, Yoko Ono

Yoko Ono, A Box of Smile, [Black Box]
New York, NY. 1971, 5.5 x 5.5.x 5.5 cm, Original Fluxus edition 

Opening the opaque plastic box that reveals a mirror in the bottom when opened, and the reflection of your smile inside. Also contains a folded paper with a printed photo of John and Yoko by Bob Gruen, with the text "A box of smile".

Source: Printedmatter