"Empty" is the New "Still Some Left"

We've all heard that brown is the new black, and 40 is the new 30, but did you also know empty is the new still some left?
At least it is according to my boys.
*ahem*

Sunday night I was presented with an urgent request to go to the store and buy more shampoo. The boys' bottle was empty, you see. And since the last person to get a bottle of shampoo from the closet in the hallway didn't write on the grocery list that we needed more shampoo, there was no back-up supply. (The grocery list which, by the way, I keep on the refrigerator so it is easily accessible for everyone in the family; which my family members know I use every.single.week. to plan my grocery run; and upon which I have repeatedly instructed my dear family members to write the names of items which need to be replaced - so we're I'm never in the position of making emergency runs to the store. ***cue:end of rant)
Fortunately (for them), I had another reason to go to the store Sunday night and now - since I had TWO reasons to go - I went.
In a perfect world, that would be the end of the story.

I don't live in a perfect world.

In my world, this is what happened: Monday morning I was walking through the boys' bathroom to get to the laundry room and I thought, I'll just grab the bottle of shampoo which was hijacked borrowed from my bathroom by the son who discovered his empty shampoo bottle Sunday morning. So I whipped open the shower curtain and grabbed my shampoo bottle. And as I did, I noticed something peculiar. There was another shampoo bottle on the floor which still had some shampoo in it. Granted, it wasn't much, but there was still some left.
So I took the two shampoo bottles upstairs with me and put them in my shower. Only, I stored the "still some left" bottle properly, so as to be able to utilize all the shampoo stored in said bottle.

I washed my hair for two days with the shampoo left in that "empty" bottle.

And since I noticed one of the boys had gotten a new bottle of dish washing detergent out, I went ahead and did what should be done to "empty" bottles of liquid dish detergent before they're thrown into the recycling bin.

You know, because I'm still operating in the days when we called it "still some left".