I don't know how to link you yet, so just type in water wiggler in the search bar at the top of your screen. I can't believe no one wants to help us out! Being self-sufficient is so hard! I THINK a water wiggler is a toy. A water- filled hot dog that turns inside out and makes it hard to hold. If you have a thermometer with a probe on it, you put the probe insidet he sleeve, don't break it. This mimick the density of an egg and gives a reading of what the temperature on the inside of your eggs rather than the air temp. You can make one yourself with a ziplock with water, no air. Just wrap it around your probe and secure it. If I'm not accurate, I hope someone will correct me.