We called em Chilly Willies. There was a brand sold in my area named after the penguin character (Chilly Willy) associated with Woody Woodpecker. So as kids we loved that and just called any brand of them by that name.

https://i.pinimg.com/originals/4b/b1/e3/4bb1e36576598c02034e86cb5c3b4115.jpg

Best color was orange IMO.