Sorry Wendy, we're a bit stuck on the "how to teach LO not to tip" phase over here. Hand the boy a sippy and his eyebrows raise for a fraction of a second while he contemplates where he's going to do the tip&drip as I like call it. He tips, it drips, he pulls the phoney shock reaction "OH!!! ohh!!! I've just dripped my milk all over the suede sofa! AGAIN!!! Better get a towel and smear it in further!"
FFWD to two hours later and it's the same thing, but replace milk with apple juice and suede sofa with freshly cleaned laundry.
Hey - maybe that's your key: a new suede sofa!!!