I'm looking for a step stool so my average height 2 year old can reach the sink to brush teeth and wash hands. Currently, she's been standing on a full box of wipes that is 11 inches, which is just about the minimum height that lets her still reach the water (a faucet extender won't work with the style faucet we have). She's only going to get taller, obviously.

Can you recommend a step stool that's non slip, since it will be in the bathroom, that's at least 11 inches tall? Bonus if we can also use it with the potty when we start potty training but I realize the heights may not work. Our bathrooms are pretty small.