Hello again! Welcome to yet another one command creation I made. Before continuing, I would like to thank Dragnoz for the inspiration (https://youtu.be/rP4SmvWmFh4). Let's jump into it!

How to make a present:
Similar to Dragnoz's video, put whatever you wish to gift in a chest. Then, throw a diamond on top of the chest. The chest will be converted into a present and a message will come up confirming the present has been wrapped. LuradoGaming made a video showing this off: https://www.youtube.com/watch?v=HlAi1bdn41U

How to open a present:
Break the present. The contents of the present will come out when you do so.

Any limitations to this system?
Sadly, yes. While the limitation doesn't break the command creation, it still does make it more challenging for users. Don't place presents on the same x and z coordinates. The items inside the presents will be overlapped into whichever present is opened first. Want to know why? The items you place in the chest are teleported into y = -1. This makes them inaccessible to players in survival. The items also have no gravity and will not despawn while under bedrock. Our problem occurs because the items would be teleported to the same block. When any of the presents are opened, all the items are teleported to the opened present. If you've got any other questions about how this command creation works, feel free to ask!

Command:
This command is only supported for 1.11+.
1.11+ : https://pastebin.com/8AzsTvAN