Yeah... [With a flat hand she indicates an as-of-yet imaginary surface over the edges of the box.] Below this level should be largely safe.

[She takes the thin edge of another box between her fingers.] I take these apart for the internal dividers. In fact using them as lids will be less wasteful. [Essentially two edges can be made into a cross for quadrants. She notches them with a tear in the middle to demonstrate the theory, but:] We might use a knife for these since they'll be transported further.