Pennies and up, including soda cans if I'm on my way to the car.
Think about your true intrinsic 24/7 per minute value. For me the 10 seconds it takes to pick up a penny is a >10% pay raise for that one minute.
What's your true per minute of life value? Take your net weekly pay, divide it by 7, divide that by 1440 (24 hours in minutes). That gives you what you're really worth per minute.