2019 update: I downgraded Habit Burger’s tea from a four to a three and a half tea bag rating because of the consistent issue they have with the flavored tea mixing with the black tea. I have a detailed post about it here.
Rubio’s serves very good tasting, freshly brewed iced tea. The brand of tea is S&D coffee and tea. This is the same brand brewed at Chipotle and Habit Burger. While good, the tea here occasionally suffers from a problem I have noticed at Habit as well. Occasionally you can taste a hint of the flavored tea in the plain black tea. This is more than likely because they use the same brewing machine for both. The price is in line with most other fast food restaurants, around $2 for a regular sized drink.