For an extra touch of elegance, chill the glasses in the freezer for at least 30 minutes before serving. Adjust the sweetness by adding a splash of agave nectar or simple syrup to the blender. If you prefer a stronger margarita, increase the tequila to 8 fluid ounces. Use fresh mango for a richer flavor. Peel and cube one ripe mango, then blend it with the other ingredients. You may need to adjust the amount of ice to achieve the desired consistency. For a non-alcoholic version, omit the tequila and substitute with sparkling water or club soda.