Aqua Fountain Aqua Cube Pet Fountain for $17.97. Select in-store pickup at Walmart to save on shipping. Otherwise, shipping is $4.97 for a total of $22.94 shipped or free on orders over $50. Here is a screenshot for your reference. It offers 40 oz of fresh filtered water and uses a replaceable charcoal filter that removes bad tastes and odors. Most places have it for about $26.