No, you should not put a Borosil tea container directly on gas stove flames. Borosilicate glass is known for its high thermal resistance and can withstand temperature changes better than regular glass, but it is not designed to be used directly on an open flame.
Using a Borosil tea container directly on a gas stove flame can lead to thermal shock, which may cause the glass to crack or shatter due to rapid and uneven temperature changes. Even though Borosil glass is more resistant to such changes than regular glass, it is not immune to thermal stress.
Instead, you should use a heat-resistant kettle or a teapot designed for stove-top use. These products are usually made from materials that can withstand direct exposure to the flame without breaking or causing any safety hazards. Always follow the manufacturer's instructions and recommendations for safe usage of any kitchen utensils or cookware.