Pro-Tip: Glue the top & bottom foam layers of your Apache case together once you've finalized the foam layout. It does a great job holding the foam together without needing to resort
EFFECTIVE ways of “gluing polyethylene foam” (rubber cement hot glue) - YouTube
White Gorilla Glue | Gorilla Glue
The Ultimate Glue Quest - Best Adhesives for EVA Foam! - Punished Props Academy
How to glue/attach foam so it's sturdy : r/cosplayprops