Soft-shell tacos
How does one make a soft taco?
Taco
Del Taco Taco King Taco Mountain Dew Taco Bell
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The first mascot of Del Taco was a character of the same name used from 1999 through 2000. While popular, Del Taco (the company) was hit by a lawsuit from Zorro Productions, Inc. and Tristar Pictures, Inc., who claimed that the "Del Taco" character – masked and costumed in black – infringed on their rights to the trademark Zorro figure. Del Taco settled the suit in January 2000, agreeing to make changes to the Del Taco character, but soon discontinued the ad campaign altogether. In its place, from 2000 through early 2006, Del Taco used Gregg Binkley to play "Dan" in their commercials. Dan, a clumsy marketing spokesman for Del Taco, was famous for his antics during their commercials. Among other things, Dan destroyed cars, broke hockey-rink glass, and mistakenly held a sales event at a nude beach, all while promoting a specific item for Del Taco. From August 2007 through July 2008, Del Taco featured "The Beast" in their commercials. "The Beast", a personification of hunger, typically stood next to a customer and persuaded him to order a particular item (or particular items) so that they could "Feed the Beast" (which was Del Taco's slogan at the time). "The Beast" made his debut in August 2007 promoting Del Taco's improved Chicken Soft Taco. In addition, he endorsed the Crispy Fish Taco in February 2008, the improved Chicken Quesadilla (with 50% more chicken) in April 2008, and Del's Deal (two half-pound bean and cheese burritos, a regular crunchy taco, and a small drink for $2.99) in June 2008. Currently, Del Taco uses a variety of commercials to promote their new slogan, "Go Bold or Go Home." The first commercial featured a team of miniature "Mole Men" to promote the Spicy Chicken Mole Soft Taco, which aired in August 2008. Ads included Del Taco's promotion of their improved regular taco in September 2008, the Classic Combo Deal in November 2008, three separate meal deals for under three dollars (including the aforementioned deal) in January 2009, the crispy shrimp taco in February 2009, the chicken soft taco in April 2009, and the chicken fajita burrito in June 2009. 
Traditionally, soft-shelled tacos referred to corn tortillas that were cooked to a softer state than a hard taco - usually by grilling or steaming. More recently the term has come to include flour tortilla based tacos mostly from large manufacturers and restaurant chains. In this context, "soft tacos" are tacos made with wheat flour tortillas and filled with the same ingredients as a hard taco.
King Taco is a fast food restaurant chain based in Los Angeles, California, serving soft tacos, burritos, sopes, tamales, nachos, and authentic Mexican drinks such as horchata, hibiscus tea, and tamarindo. Some locations also serve roasted chicken. King Taco has its headquarters in Los Angeles. 
Since 2004, Mountain Dew has given Taco Bell stores the exclusive right to carry Mountain Dew Baja Blast, a blue-colored, tropical-lime-flavored variety of the popular soft drink. Baja Blast was developed to appeal to Taco Bell customers, with the manufacturer conducting extensive research to ensure that the name, color and taste of the drink complemented Taco Bell food products. 
Taco Bell in Singapore existed for a number of years, mostly as combination stores with KFC such as the one that operated at the Funan Digital Life Mall, but in 2008, Taco Bell completely pulled out of Singapore. 