ON the reverse side is a picture of a computer and keyboard. The screen of the computer is a dark brown.
Once hot liquid is added, the computer screen clears to reveal the name ENVOY 100. ENVOY 100 is the name of the text messaging system AGT created for Wireless Text Messaging. It was introduced in 1984 and utilized a hand held messaging device about the size of one of today's 7" tablets, but thicker and with its own antenna.
DESIGN: 2+ Sided
THERMOCHROMIC: 1 Color
TYPE: Corporate Freebie
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