Amazon has the 5-Pack of Obrilo Sugar-Free/Zero Calorie Liquid Water Enhancer (2oz bottles, tons of flavors) for $20.95 - 10% off with Subscribe & Save (can cancel anytime) - $10 off coupon (check “Save an extra” box, eligible on first S&S order for this product) = $8.85 with free shipping on $35+ or with Prime. Makes 150 drinks.