Creative Duplication

I was playing around until I found a duplication glitch. Only works in creative.
How to dup.

1. Get at least 2 similar items.
2. Make sure to not be in the survival inv tab.
3. Drag the items over your hotbar.
4. Double click one of the items and lay the stack of items back in the hotbar.
5. Open a chest.

Look at the pictures to understand bettr.