Apprentice to Boss. Putting these high quality hardhat stickers on your helmet, lunch box, thermos and toolbox is a fun way to stand out and bring humor to your workday. Whether you are on the job site, warehouse, forklift, mine or production line, we have you covered with stickers for years to come. Our stickers include some of the most popular hard hat stickers in the world. These hardhat stickers will last a lifetime!