Can you buy child safety proof containers for cleaning supplies?

Child proofing . Yes. You can also buy locks to put on the cabinet you keep them in. Most stores that carry baby products, have a child proofing section. .
Better than that.... There are an increasing number of resources, on line and in books, on how to clean your home in very safe and non-toxic ways. It's amazing what you can do with things like white vinegar, baking soda, and lemon juice. Or, if you're pressed for time, there are more and more "green" and non-toxic cleaning products widely available. Child proof containers tend to keep out adults, not children.