Most major grocery and home improvement stores host Primo stations where you can exchange empty 5-gallon bottles for pre-filled ones or use a self-service refill machine for a lower price per gallon.

You can buy through three primary methods: visiting a retail exchange station , using a self-service refill machine, or signing up for home and office delivery . Major Retailers for Exchange & Refill

Primo 640-fl oz Purified Bottled Water (With Empty Exchange)