Review Content Really stays cold for over 8 hours I gave this to my mother as a gift for her dog Sweet Pea who always seems sooo overheated when left outdoors. She says she can leave Sweet Pea outdoors more now that she has guaranteed cold water for over 8 hours ... its been keeping the water cool for more like 10 hours! FYI buying the extra freezer core is a must... the only way to be consistant with keeping Sweet Peas water cool 24 hours! Great pet lover gift! What a cool idea! Our dog loves to sit outside and we provide fresh cool water. This keeps her water cool a long time, even in direct sunlight. It is easy to clean; just wipe out with a paper towel and pop back in the freezer.