Sangrita is a popular beverage to drink with tequila. Not to be confused with "sangria," a fruit and wine concoction, this beverage is a tangy mixture of tomato and orange juices, usually spiked with hot chiles and lime juice. It may sound odd in flavor, but sangrita is the perfect accompaniment to good quality tequila, like an aged anejo or a good reposado. The tequila and sangrita are poured into separate shot glasses and the two are alternately sipped, not chased. First the tequila, then the chilled sangrita. Slowly, one after the other. (from Wikipedia definition)
This is a spicy drink, if you are concerned about it being too hot, only add in half of the spicy ingredients. You can always add more later!