According to the Allee Willis Museum of Kitsch:

Back in the 1950′s, Blakely offered a line of desert-themed glasses and dinnerware to costumers as premiums. When you filled up your tank, you would receive a free glass featuring one of eight different cactus designs, and additional pieces such as pitchers, plates, teacups and trays were available at a small cost.

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Blakely Cactus For Sale related articles from the blogosphere…

Vintage Blakely Arizona Cactus Cup & Saucer – Barrel | Shop Yippee

shopyippee.com4/27/10

Vintage Blakely Arizona Cactus Cup & Saucer – Barrel. State: Arizona; Country: United States; Zip/Postal Code: 9.99; Listed: April 27, 2010 10:34 pm; Expires: This ad has expired. image …

Hog Ridin' Fools & Blakely Tumblers – True West Historical Society

truewest.ning.com11/16/10

In real life, the best example of gas station tumblers (a free glass with every fill-up!) was Blakely's Arizona Cactus Tumbler set. And this was when gas was 19 cents a gallon! I have had at least five sets of these classic suckers.

Stamp Cost | Memorabilia Tells History Of Gasoline In U.S.

usstamps.stampget.com5/22/11

Among Clark's collection is a set of Blakely cactus-decorated and frosted glasses with matching pitcher. Blakely was a gasoline company started in Gilbert. Its label was Blakely Rocket Gas, but it was just regular gasoline.