Make Smaller Lids.

Designers of products in bottles cleverly include caps that double as cups to pour a measure of the liquid into and use.

The larger the cup, the more product is used, and the quicker the consumer will make another purchase.

The more authority you give a person, the more they will rely on it to get things done.

The less authority - the more they will rely on persuasion, negotiation, enrolment, and creativity.