system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does an Oreo package reseal itself without being sticky?

Edit: I can't believe how many up votes this got! I was just a bit stoned on my couch eating these fuckers. Next thing you know I'm tits deep in answers and up votes. Thank you!!
gpt
In medical devices they coat the surface being stuck to in low adhesion material like a thin silicone. This allows for some stick without allowing for a complete adhesion. Like the Post-it note, they use a powerful adhesive but coat it very thin. The thinner the adhesive layer the less it will tend to "gum off" and leave residual. 

Thin coats of powerful adhesive plus low adhesion coating on the surface being such to.