Amazon offers the Nestea Flavored Tea 16.9-oz. 24-Pack in several flavors for $9.99. Check out via Subscribe & Save to drop the price to $9.49 with free shipping. That's about a buck less than you'd pay in local stores.

Be sure to cancel Subscribe & Save after your order ships to avoid being billed for subsequent shipments.

Update: It's now available in Raspberry for $9.09 before the steps above, $8.64 with free shipping after.