Rub a slice of lime about the rim of each glass.
Mix the table salt and chili powder together and pour it on a plate.
Roll the rim of each glasses through the salt and chili powder mixture.
Fill the glasses with ice.
Mix the tequila, Cointreau, lime juice, and mango nectar in a small pitcher.
Pour 1/2 of the cocktail into each glass.
Garnish with mango and lime slices