These are peel-and-stick so it could not be easier. Included is simple instructions with each sticker. There is an alcohol wipe to clean the surface where you'll put it. This means it will stick well. And when I say "well" I mean FOREVER.
Apply to: Water bottles, laptops, notebooks, travel mugs, music cases, doors, walls, tool boxes, cabinets, work stuff, friends, and whatever else you can think of!