My raspberry jam seems to go from full to 1/4 inch from the bottom magically. And seems to stay that way. 
I can get through five or six bottles of shampoo before the conditioner even looks like running out. I’ve never been able to figure how people use more conditioner than shampoo. Don’t most people do two shampoos then condition?
As to the original question: I’m constantly running out of stawberries. I buy two punnets everyday but still it’s not enough.
Cheese and potatoes
Already been said, but money’s the big one. I’m always running out of that stuff…
Beef, bean, and cheese burritos.