For the past couple of years, Amazon has been trying out a new marketing gimmick on the streets of Seattle -- what it calls the Treasure Truck. The Treasure Truck is a specially outfitted truck stocked with flash deals for sale to local customers via the Amazon smartphone app. The truck drives around town dispensing its hot deals -- and more -- wherever it goes.

Amazon's whimsical, circus-like vehicle is designed to stand out. You definitely won't be mistaking it for a UPS truck. Here's how Amazon describes the Treasure Truck experience:

At Treasure Truck, we handpick our favorite new, trending, local, or delicious items, load them on the Truck, then cruise around town spreading joy for everyone with a smartphone and an appetite for fun. A hit in our hometown, our fleet is crisscrossing the country to some secret destinations. We won't spill the beans about where and when -- but stay tuned!

Past Treasure Truck specials include GoPro Hero4 cameras at 64 percent off, discounted Hatchimals toys, fresh oysters (with instructions on how to shuck them), free-range turkeys (including a roasting pan and bag), beach cruiser bicycles, and inflatable paddleboards.

But not everything on the Treasure Truck is for sale -- Amazon likes to surprise and delight its customers with some unique freebies, including free pint slices of Ben & Jerry's ice cream, a mini pumpkin patch, samba dancers and a free trip to Rio de Janeiro for one lucky customer, free bags of candy and Lay's potato chips, and much more.

The Treasure Truck works like this:

-Amazon handpicks one "must-have" thing (and some choice freebies) and loads up the Treasure Truck.

-Each day a text is sent to your phone, revealing the day's product offer. (Sign up for offer-day notifications by texting "TRUCK" to 24193.)

-If you're interested in buying, you purchase the item using your smartphone Amazon app, then pick it up at the Treasure Truck (which parks in different locations during the course of the day).

While the Treasure Truck has so far been a Seattle thing, Amazon just announced that it will soon be rolling out this new marketing machine nationwide (rumor has it that at least two dozen cities are on deck for the rollout).

For more details, check out Amazon's pirate video below.