Fall forever and ever with this super easy build. No redstone required! However, you do need a command block so only PC users can build this as of now.

Time Capsule Special! 

Go ahead and suggest any message you want to leave our future selves. (Cannot be inappropriate!) 

After I get build the time capsule I'll make a video of me putting in all the submissions and even put your name on a wall inside. The time capsule will be sealed and cannot be opened until I reach 151 subscribers.
At that time I will make another video opening the time capsule. So give some suggestions and don't forget to like, share, and subscribe to me. I make Minecraft videos :) 

Feel free to follow me on Instagram too https://www.instagram.com/dannyballsub/