Patent ID: 6270256
Filing Date: 2001-08-07
Classification: B65D

Abstract:
A bag formed of sheet material and having an opening to enable access to the interior of the bag, a closure portion for closing said opening, adhesive for securing said closure portion to said bag in order to seal said opening, said adhesive being applied to one of the closure portion and the bag, and said adhesive and the other of the closure portion and the bag having mutually opposing surfaces which are adhered together to seal said opening when said closure portion is positioned for closing said opening, and indicator material applied to one of said opposing surfaces, said indicator material being adapted to indicate wetting of as least one of said opposing surfaces with saliva upon attempted sealing of the opening;wherein said indicator material comprises a dye and a carrier material in which said dye is supported,wherein a message is printed on said one of said opposing surfaces, said message being hidden by said indicator material when not wetted and being revealed when said indicator material is wetted.