This New Designed Lunch Box Has An Airtight Lid Easy To Keep In Lunch Bags Backpacks Or Handbag Material This Lunch Box Is Made Up Of Food Grade Sus304 Pp Material And Size Of Stainless Steel Tiffin Lunch Box Is 25X18X6 Cm Lunch Box Lunch Box For Kids Has A Beautiful Breathable Button Design And Seal Ring Design And It Prevent Freshness And Its Inner Surface Is Very Smooth The Meal Preparation Container Is Also Easy To Clean There Is No Doubt That Stainless Steel Is The Ideal Material Safe Durable And Beautiful So We Decide To Design A Stainless Steel Box That Was Safe And Durable For People Live In A Busy Lifestyle To Pack With A Variety Of Healthy Foods Thermal Technology The BuiltIn Water Injection Feature Makes It Easy To Heat Or Cool Simply Add Hot Or Cold Water Into The Bottom Basin Before Breakfast Lunch Or Dinner The Bottom Bowl Is Made Of Food Grade Pp And Can Also Be Used To Hold Fruits Or Salads The Lunch Box Itself Does Not Have A LongTerm Heat Preservation Effect It Needs To Be Added With Hot Water To Achieve Heat Preservation And The Heat Preservation Time Is About 1 Hour