Caterpillar shaped pencil case

[Dludnerad]

These were really popular in the mid 70's in Australia, but I can't remember what they were called. I used to have one when I first started school.

It's a hard plastic container shaped like a caterpillar or worm. You pull the head off and store all your pencils and stuff inside the body. I think they were about a foot long. I had a purple one, but they were also available in pink, yellow, green, blue and orange. Half the class had them sitting on their desks

Thought it would be easy to find one on ebay, but so far I'm not having any luck.
Can anyone remember what they were called so I can use the right key words in my search?