The 500 gm, square jar with 63 mm Lug Neck is 100% food grade certified, FSSC 22,000 certified, premium quality, and microwave and dishwasher safe. These can be used to pack a number of products such as ghee, honey, pickles and chutney, dry fruits, candies and chocolates, desserts, salsa, cooking sauces and spreads, etc. These glass jars are intert and unreactive and do not let chemicals leach into the product packed.