You can also use them in some of the recipes for yard/garden treatment recipes of Jerry Baker. Here is one recipe using coke (or any soda pop... doesn't matter):
The recipe came from Tim Heffron, a former groundskeeper at a golf course. All you need are five common household ingredients and a 10-gallon hose-end sprayer. This recipe can be modified slightly for other less dry climates, but for areas like Colorado it works wonders. And it's a heck of a lot cheaper and more effective than the store-bought mixes.
You will need:
One full can of regular pop (any kind-no diet soda)
One full can of beer (no light beer) 12oz
1/2 Cup of Liquid dishwashing soap (do NOT use anti-bacterial dishwashing liquid)
1/2 Cup of household ammonia
1/2 Cup of mouthwash (any brand)
Directions:
Pour into 10-gallon hose-end sprayer (other sizes will work too)
In high heat, apply every three weeks.
I used to have a recipe for a Dr. Pepper cake. For that, or for the garden recipes, it doesn't matter if they're flat.