Off the top of my head:
Cheerios
Toilet paper
Light
Not necessarily. If the subspace continuum abruptly halted due to the tissue-penetrative-metastasis of the human body decaying at an exponential rate, the malignanised Telomerase-active reverted germline-like carcinosarcomaic neoplasms would no longer produce light.
Didn't you see Demolition Man? By 2032 toilet paper is replaced with three seashell. I have no idea how that is going to work but 2032 isn't that far away so we should start accepting that toilet paper is nearing end of life.Toilet paper