the creatine supplement powder i get has this wonderous resealable bag that uses something similar to velcro to stick together, like imagine velcro but it’s just a bunch of tiny rectangles on either side that friction fit together.
it seems effectively infinitely durable, has no moving parts, and because it can be made however wide you want you don’t have to worry about lining it up like the traditional press-lock bags, and it’s way more of a solid lock.