Spoil Me Now

I have this personal consumption rule: If the product is capable of spoiling, I'll never eat or drink the last portions of it. Bread? I'll never eat the last slice. Salsa? I'll always throw away the last 1/4 inch. Milk? There's no way I'm emptying that gallon - I'll always leave a tad bit in the milk container and then throw it out. Sorry, just a random thought.