Amazon has the 6-Pack Malta India Malt Puerto Rico Beverage (8 oz each) for $3.58 - 5% off with Subscribe & Save (can cancel anytime) = $3.40 with free shipping on $35+ or with Prime (extra 15% off for 5+ subscribe and save orders).  Sweet carbonated soda with a strong earthy, malted barley taste, with a molasses like flavor.