The garbage is held until it can be transported out of the cell and the nutrients are held until they can be used. Vacuoles are large, round, water-filled sacs floating in the cytoplasm. Most plant cells and some animal cells have vacuoles. Plant cells often have one very large vacuole. Animal cells, if they contain any vacuoles, generally have a few small ones.
Vacuoles act like storage tanks.
Food and other materials needed for the cell are stored inside the vacuoles. Vacuoles can also store waste products. In plant cells, vacuoles are the main water-storage areas. When water vacuoles in plants are full, they swell and make the cell plump. This plumpness keeps a plant firm.