I think someone else said something similar earlier, but no. I don't understand why we don't, but we don't charge extra for not diluting the drink. You would think we would. As for cost to product use, it doesn't really make that much a difference. The amount Starbucks pays for a drink to be made vs how much it costs is already a super huge price difference, so couple people getting the straight concentrate every once in a while at a store that sees 4,000 a day isn't going to make a difference.