She rattled her hand through trash, oil cans, rags, and coffee mugs until she found what she was looking for, a tire iron.

NPR: Excerpt: 'The Assassins Gallery'

Same deal: Dinner last night with Mayor Kathy Taylor and assorted Tulsa entrepreneurs who are finding their fortunes in everything from software to rental cars to gas cans to oil.

FORBES: Heartland Venture Capital Boom

The Parts Dept. was on the first floor and one of my jobs was to take cans of oil on a trolley down to the petrol station below for sale to motorists buying petrol.

BBC: Help city building tell its story

Investor cans bypass both company risk and commodities futures trading costs by purchasing U.S. Oil, an exchange-traded fund that tracks the price of oil futures.

FORBES: Oil: How Low Can It Go?