The place is a shack, looking at the levee. You are greeted with a 6 and a half foot high ceiling (in a city where the average ceiling height is twice that). It shares the building with a very good BBQ place (possibly the same owners)..

With locked in pricing, a particular price per gallon is either fixed or capped for one year. A fixed rate doesn go up or down. A price cap sets the highest price you will pay, but if market prices go down, you pay the lower prices.