Woot offers Amazon Basics - Pet Water Fountain with Stainless Steel Top, 3L ,White (3 Filters included) for $9.99 (orig. $25.99) + free shipping with Prime.

Product Description:

3L Large Capacity: It has a water capacity of 3 liters, which means that it is a perfect fit for small to medium pets, without the need for frequent refilling of water
High-quality: The fountain container is made of high-quality ABS material,durable, safe, and BPA-free.The lid is high grade stainless steel, durable and easy to clean
Excellent Filtration System: It provides fresh clean water for your lovely pets, with 3 filters,two of them are replacements.It is recommended to change the filter every 2-4 weeks.
2 Water Flow Design: Two different water Flow Designs: flower and tree. The water streaming on the fountain will draw your pets attention and encourage animals to drink more, which is beneficial for your pet's kidney health.
Ultra-quiet pump: The pump on this water dispenser is ultra-quiet, has low-energy consumption and will last 1.5-2 years.
Shipping Note: Shipping to Alaska, Hawaii, PO Boxes, and APO addresses is not available for this item