I have used oversized rubber bands for years to keep opened coffee flour sugar cornmeal bags closed tightly so they don’t spill onto my shelves - trouble finding them however so these are great.
I use these in a appt. book to hold the day in place. When wrapped around the book and current week works very nice to open book to the page you need. Useful for around waste baskets so the liner does not slip out. Very nice highly recommend.
Large rubber bands are a must sometimes and these are sturdy and large. But even better they come in different colors. I love the purple ones the most but the rest are fun as well.
I use these bands when carrying several paper file folders in a briefcase either to provide support for a large folder or to group similar folders together.