The Lock & Lock Bisfree Modular Stackable Collection Is A Premium Airtight Container Range That Is Designed To Save Space In Your Pantry And Fridge. From Storage To Plating, All Together!: Bisfree Modular Consists Of Sophisticated Design With Stripe Pattern And Modern Brown Colored Cap. The Container Can Be Used As Tableware Right After Heating In Microwave. 99% Antibacterial Silicone Packing: 99% Antibacterial Silicone Packing As Well As Lock & Lock’S 4-Sides Locking System Keeping From Invisible Microbes Penetration Such As E.Coli And Mold. Use It In The Freezer As Well As The Microwave!: No Color Change, No Twisting And No Damage In The Result Of The Test Conducted By Sgs Korea (Cold And Heat Resistance Test Of Ecozen Under -40? To 100? Temperature During 1 Hour). Modular Design System: Stackable Bisfree Modular Series Is Designed To Be Stable And Tidy. It Helps To Minimize Extra Space With High Space Efficiency. A ‘6Mm Hidden Cap’, An Idea Born From Housewives’ Inconveniences When Taking Food Containers From The Refrigerator, Is Designed To Keep Stacking Containers From Falling Down To The Floor. Features A 4-Sided Locking System That Works With The Silicone Seal To Ensure A 100% Air And Liquid Tight Function.