(Melting ice.)
Preparations for a Weekday: Is One Allowed to Wash One's Hands Over Dirty Dishes in the Sink?;
(Melting ice.) breaking the ice cubes to remove them from the ice tray; pouring hot liquids onto ice cubes (from a kli shieni);
fliptop, snap top caps, e.g. ketchup bottles, salad dressing bottles, etc.