A case of twinkies- they should still be fresh.....
What would you put inside a time capsule to be opened in 100 years?
A selfie of myself of course ... The people of the future need to know "I'm sexy and I know it. " ;p
Her!!!
A list of things that explain phrases that we use, but don't really do anymore. Like "roll down the car window" I would put a picture of the old crank and explain how we had to roll it down instead of push a button. Or "hang up the phone" and put picture of an old phone and explain how we had to put the phone in the cradle.
A list of different world events, rules and actions.
This way a memory will be kept out as well as a history that can expose what's been disappeared out of world's page or been twisted by it's concept.
My tax return.
The original pong game you hooked up to your tv
My neighbour.
Be sure to include a bunch of Trump stuff. 100 years dfrom now they will be asking "What the Hell was wrong with those people?"