They are designed in rectangular shapes and  comes in a capacity of 3l and 2 litres.
When it comes to baking, glass offers  a number of benefits over metal pans.
Glass bake-ware is non toxic, non reactive and easy to clean. More so it can offer you superior baking results!
If you're looking to replace non stick bake ware, consider making glass your first choice!! Use glass dishes when baking  with eggs or acidic ingredients as metal pan can react with the acidity and cause foods to discolor or leave metallic taste.
Additionally, glass retains heat fat longer than metal, because of this property, batter baked in glass often takes longer and at the same time, it's easier to to bake brownies or any other tins with glass baking tins.
It has great and consistent results after baking.
They are portable & cannot break despite of the high temperature.