There are a multitude of uses for small jars. They can be used for storing food, arts and crafts supplies, paperclips and other small office supplies, or bath products such as creams and lotions. Some models are more decorative than others, with lids that don’t close tight. Some are square, making them not only aesthetically pleasing, but also easier to pack tightly when you have several of them to put in a small space.
Here’s a model I find quite nice:
Small square glass jar pictured: Anchor Hocking 85587R 1 Quart Stackable Square Clear Glass Storage Jar (Case of 4)