Before propane, summertime grillers had to ignite barbecue fires by racing across flint tracks in wooden shoes or snapping overenthusiastically in backyard poetry slams. Enjoy the relative ease of modern ignition with today's Groupon: for $10, you get a 20-pound propane grill tank delivery and exchange from The Propane Express (a $20 value). Free delivery is available only on certain days of the week, which vary by zip code. See the list of delivery zones for areas served.

The Propane Express team of tank haulers bestows a flammable lifeline to summer barbecues, allowing customers to occupy their own hands exclusively with patty flipping. On the day of a scheduled appointment, a representative arrives with a fresh, 20-pound tank of flame-feeding fuel and exchanges it for any tank you may already have, as long as it bears little to no rust.

Customers need not be home during delivery, freeing up valuable time to practice grilling skills in the low-pressure setting of a friend's grill-out. Your full tank arrives in its birthday suit, complete with the proper OPD valve. As an additional benefit, all new customers are enrolled in The Propane Express loyalty program, which gets you a $3 credit on every third tank exchange. The Propane Express guarantees that all tanks will will be filled with 17 pounds of propane, 2 more pounds than most of their competitors, ensuring that no sneaky steak evades your grill's fiery tongue.