Gluesticks

How does glue not stick to the inside of a bottle or tube?

You know glue bottles and glue sticks? Why do they never stick to the inside of the tube? weird

Public Comments

1. I think its coated on the inside with some wax or something.
2. i'm sure it needs toreact with the air. thats why when you leave thelid off it dries. some superglue needs a spray in activator or a resin to harden too. but the normal typ,i'm sure the magic ingrediant,orrather lack of it, is air.
3. Polyethilene (a common plastic used for glue bottles/tubes, and other kind of bottles) has very few (and hard to find) solvents that can "etch" it. Considering that most glues contain no traces of such solvents, they can't make a mollecular bond with the package, and therefore will easily peel off.