Lunch Box Thermos has been in use since 19th century. The first piece had pictures of children playing and was shaped like a picnic basket. Geuder, Paeschke, and Frey, a Milwaukee company began using the likeness of Mickey mouse on the top of its ‘lunch kit’ in 1935. Lunchbox with cartoon pictures became popular after that. The lunchboxes had Thermos bottles along with it. Though all the bottles were not manufactured by Thermos Company, the name was generally used.