Make an Evaporative Terra Cotta Beer Chiller

Step 3 Add the sand and the can.

Next, add a little sand to the bottom of the pot. The idea is to provide enough so the tin can will rest on it, but not so much that the can sticks out of the top too far.

Add a little at a time and press the can into the pot. As you get close, the can will start to mash down the sand. Keep adding until the can is resting on sand and there's a small gap between the can bottom and the edge of the pot.

Then it's as easy as setting in the can and filling the edges with sand. Leave a gap -- even if you're not going to use cement to seal it, if you fill it to the lip of the pot then there will be no place to add water and let it sink in.