Drinking from a cup

Very cutely- big guy has figured out how to drink from a cup without dumping it all over himself. We've been practicing for quite a while but always with me holding the cup also. But this weekend when we were all alone- I left a cup of water on hubs's night stand while I went to use the restroom. I hear big guy walking towards me and he's holding the cup. I warily remind him to be careful because it's a glass cup. He holds it up takes a swig and hugs it to his chest. Then he takes another big drink and hands me the cup. And by hands I mean practically drops it and it's lucky my hand was there. And ever since he's been showing off his new skill. Very cool. And very not wet!