Soap2O Aluminum Vial Foaming Hand Soap Concentrate Delivers Premium Performance With A Smarter, More Sustainable Refill System. Each 100 Ml Aluminum Vial Mixes With Water Onsite To Create 1 Gallon Of Rich, Luxurious Foaming Hand Soap, Eliminating The Need To Ship Heavy, Pre-Mixed Liquid Soap. This Reduces Freight Costs, Storage Space And Plastic Waste While Maintaining High Cleaning Standards.