Some things I don't understand

There has got to be a better way to dispense shampoo*. Think about it, has anyone in the history of hair washing ever successfully used all of the shampoo in the container? I feel like every time that I'm just at the end of a bottle, there's at least two lurking tablespoons of Paul Mitchell coating the inside walls or stuck in the shoulder-- never to be used. Destined for waste. 

Though my concern is one both legitimate and troubling, the governing shampoo body will never take it into consideration. Why? Because due to the inherent wastefulness of present shampoo packaging, I have to go buy a new bottle two tablespoons sooner than I would with a more efficient dispenser. So they're making bank and I'm left in an emotionally exhausting battle of wills against a plastic bottle, hoping against hope that I might salvage a few extra teaspoons of Tea Tree Scalp Treatment. 

Garbage.

*This also applies to lotion. And ketchup.