The famous Sagaform rocking whiskey glasses will be loved by your guests as a novelty and a matter of practicality. The convex bottom of the glasses tip the bowl, but they don"t spill. And since whisky is meant to be sipped, the sloshing and spinning is part of the experience. You don"t have to drink whiskey to enjoy these glasses, they can be used for anything. Kids love the juice in them. A perfect gift.