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How to make a tequila popper 
Set up your shot glasses. 
Place the glasses on a bar or table, and measure the tequila into each glass. For a drink that isn't as strong, only use a quarter or half ounce (7.5 or 15 ml) of tequila.
For a stronger drink, use a full ounce (30 ml). To make coffee tequila poppers, use a small serving glass instead of a shot glass.