The glass top stoves can be used safely and are resistant to heat. They are strong, durable, can withstand cracks, and are firm because they are made with toughened glass. An ISI mask is necessary to use gas stoves. The Indian standard institute (ISI) mark is the certification that has received the title from the Bureau of Indian Standard BIS. This certification certifies that the product meets all Indian standards. It is one of the most trusted brands in India. The ISI mark is mandatory in India for certain kitchen appliances, such as LPG cylinders and LPG valves. This mark gives you confidence that the brand is safe for the house.