The cooler bag was created to hold a 5-gallon water bottle (sold separately), and ... Convenient side pocket holds manual and optional dispenser. Additional features (sold separately) include ...

Here's how portable water dispensers ... 5 case of 16.9-ounce bottles every few months. The case holds 40 bottles with a total volume of 5.3 gallons (20 liters), so I'm spending nearly $1 per gallon.