My new winterizing trick

I was tired of flushing the antifreeze out of my water heater every spring. Last year I siphoned the water out of the tank. NO antifreeze. ( mouth full of bottom of the tank water…yeah eww ) This year I found a little water pump that is powered by an electric drill. $ 8.99 at the hardware store. Two years ago I just removed the drain plug, and let the water flow out, figuring that the small amount of water, and the shape of the tank would prevent the tank from cracking. Then I got worried that water might be in the lower tank outlet. Sorry if this is old news