I have no idea how anyone raised a child before the era of petroleum products.
2) Paper towels.
Oh God, the paper towels. I can't remember the last time I had the honor of finishing a roll. They always get shoplifted out of the kitchen whilst I am unaware and disposed of. Payne once engineered a paper towel road through the kitchen, down the entry way, and through the family room while I was (apparently very focused on) doing the dishes.
3) Dairy products.