Topo Chico is definitely a must try. Costco does a “Kirkland Signature Italian Sparkling Mineral Water” which is surprisingly good. Like Topo Chico, the Kirkland water maintains carbonation for what seems like hours post opening, unlike some sparkling waters
Their 'Sabores' (flavored) line is nice too, even if I find it doesn't have that same bubbly-ness.