This is a glass cup that originally contained commercially available fruit jelly. It has been washed and stored at home. It comes with a thin plastic cover, but it's not airtight, just a light cover. The plastic cover is thin and not durable, but the glass cup itself should be able to be used repeatedly for a long time. Besides using it for serving sweets like jelly, it would also be good for hydroponic cultivation of small houseplants. The dimensions of the glass cup are (outer measurements): top diameter 6cm, bottom diameter 5cm, height 5.5cm.