An insulated food jar will maintain the temperature of the food and keep it fresh and keeps your kids away from spoilt food.
Lighter and portable: In most cases, stainless steel tiffin boxes are much more portable and lighter in weight than the glass versions. This makes them durable enough and easier to carry around whether your kid is heading to school or an adventure picnic. Glass tiffin boxes can be heavier and could weigh you down
18/8 stainless steel is 304-grade stainless steel, which is the most widely used and flexible austenitic form of stainless steel. The numbers 18/8 represent the composition of this steel as 18% chromium and 8% nickel, making it very resistant to corrosion and oxidation
If you're concerned about BPA and the possible chemicals that could leach from a plastic bottle, opt for stainless steel. This lunch box is constructed from culinary-grade stainless steel and is non-reactive metal and is best-insulated food jar.