Opening and closing cereal boxes, cookie packages, books, etc. with letters, numbers, pictures printed on them.
מחמת חסרון כיס Machmas Chesron Kis: Inexpensive Items — Example of a Pen;
Is one allowed to drink the juices which oozed out during eating; grapefruit issues.
More Important Information in Reference to the Refrigerator and Its Light. How to Work with Water Coolers on Shabbos;