Where Is the Best Place to Store All of Those Collected Upgrade parts?

There are a few storage chests in the game, but I really like the cardboard storage boxes they are so cute. You can change the color and get different pictures on them. There is also a mod with more swatches. I usually have a little storage room or basement with some cardboard boxes. Although to be honest I've never stored upgrade items because I am always upgrading and never have enough.