Cooling products can be activated in a variety of ways depending on their technology. Evaporative cooling products require water. Wet evaporative cooling products are activated by running or soaking in water, while dry evaporative products are filled (similar to a water bottle) so that the exterior remains dry. Evaporative cooling products do not require the use of a refrigerator or freezer. Phase change cooling does not require moisture, and packs can be activated by placing them in a cooler of ice water, freezer, refrigerator or near an air conditioner.