Halve your limes and squeeze out the juice.

Add lime juice to a jug halfway filled with ice.

Add tequila, Cointreau and a bit of agave syrup (if you like it sweet). Give it a stir then top it off with Fever-Tree Mexican Lime Soda.

Rub your glass rims with lime and garnish the rims with salt. Pour your pitcher into your glasses, garnish with lime wedges, and enjoy.