My LO loves sipping from a glass too, which is fine at home, but recently whilst out and about I've been taking a spouted cup bought in a set from Ikea, which is shaped like a penguin, and wears a balaclava (well, what else would a penguin wear?) that protects the spout from grubbiness. The only downside is that it will leak badly even whilst wearing said headgear, but LO really loves it.