I actually have only used popsicle sticks. Yes, I'm cheap, but seriously.... I grab a stick, pull out the pocket knife and quickly carve the appropriate design. Been doing it for decades now, and has the added bonus of removing the ice cream, orange sicle, etc. in order to have the sticks on hand.
Quick tip - I've always found it easier to remove the ice cream before carving/using the stick. Otherwise your ear is laying somewhere parallel to the muzzle or cylinder, and you risk dripping into the mechanism when it is hot in the shop.