So I bought this lithop a couple weeks ago from a nursery in Santa Monica. Before I bought my plant, I was browsing around and then saw this really cute display that the owner had made with another succulent. He basically placed it in a cup like container and covered it up with sand so that the head of the plant just stuck out. So I asked him if that was possible with my Lithop and he said sure. So my aunt bought me a little glass vase and some sand and together with my little cousin we planted ours. Now i'm kind of second guessing the owner's advice because water doesn't drain well in sand. Any advice?