IQ stick Coca Cola advertising pen holder game in box 1980

In the original box but in clearly used condition comes this 1980’s hit toy, the IQ stick. You can move it to make all kind of forms but in addition it has a hole to keep your ball point pen in. To top things off it was produced for Coca-Cola with advertisement on the box and stick (mostly worn off). Still very usable and looking great just in the box as well. The box measures ca 22cm or 9 inches wide. See the attached video on vintage Coca-Cola commercials through time.