I've found another trick in the war against kitties who like to knock things over. Simply keep everything up on the wall and out of their reach.
I used 22 gauge floral wire, two eye hooks (attached at studs) and various containers with pronounced lips on them (to loop the wire under before you twist it tightly close in the back).
One important note- the wire is one use only. I suggest that you don't go untwisting and retwisting it. I promise you. It will break. Or you could use a thicker gauge wire (which strangely has a smaller number), but even with that, I think there's a limited number of times you could do it before it looses all tensile strength.