Make sure you know how it works:
Outdoors when the KoolCollar is filled with ice. The melting ice runs down the front of the dog and not only offers a comfortable cool sensation, but also more importantly promotes evaporative cooling over the very vascular chest area of the dog. The action of the water evaporating cools the blood and the core temperature of the dog.
Indoors when the KoolCollar is filled with the KoolTube. KoolTubes are intended to be used anytime it is not practical to have your dog dripping water from using ice in the KoolCollar. The KoolTubes are a semi-disposable, non-toxic, and non-staining alternative to ice. It is perfect for use inside the house, traveling in a motor home, car, truck, etc.