A vacuole is a cell organelle; is it basically a membranous bag filled with fluids. Vacuoles store water and certain materials that are water-soluble. They are present in all plant and fungi cells.They are also found in some species of bacteria and in some animal cells.In plants and fungi, vacuoles store water and some pigments, and they also provide turgor pressure to support the cells from within.In general, they are larger and more obvious in the plant and fungus cells than in the other organisms discussed here. In bacteria vacuoles are believed to be a storage organelle.n plants and fungi, vacuoles store water and some pigments, and they also provide turgor pressure to support the cells from within. In general, they are larger and more obvious in the plant and fungus cells than in the other organisms discussed here. In bacteria vacuoles are believed to be a storage organelle.