Thousands of ocean creatures are killed by plastic products, which cannot be recycled. Plastic waste has made a threat to a sustainable environment for human beings. We need to take some measures to change the worsening environment. Using reusable silicone lunch boxes and refusing to use disposable plastic kitchen utensils will be our first step.Steel food containers will rust, and glass containers can easily be broken. Disposable food containers will release some harmful substances and pollute the environment. However, silicone food containers are unbreakable and safe for the environment and food.Products Features - Collapsible and stackable for easy storage - Rectangular food containers for meal prepping. They collapse to 1/3 of their original size with a nesting design for maximum organization. Fits into almost all kitchen and pantry compartments or any cabinet or drawer - It is perfect for Camping, Hiking, kids' lunch boxes, leftovers, take out, or as a meal prep container. Each container is great to keep dry or wet foods like cereal, fruits, vegetables, baby foods stay fresh - BPA-free food-grade silicone - Each container is made of BPA-free food-grade silicone that is non-toxic, tasteless, odorless, non-stick, and easy to clean - Airtight lids make these great for the office, classroom, camping, road trips, and more. NOTE: These four lunch boxes are not suitable for liquid, such as water and soup which can leak from the valve - Small and large colorful lunch boxes - Decorative small and large portion control which are leakproof - Snap-on clear locking lids. They are designed with snap-on clear locking lids and an air vent for convenient microwave heating - Microwave Freezer and Dishwasher safe - This food container set is dishwasher safe for hassle-free cleaning. They are also freezer safe for conveniently storing leftovers, and microwavable for when you need to warm your cold meal right from the fridgeProduct Sizes and Capacity - 1 x 350ml - 130mmx95mmx30mm - 125g - 1 x 500ml - 165mmx110mmx35mm - 180g - 1 x 800ml - 195mmx165mmx40mm - 250g - 1 x 1200ml - 235mmx160mmx40mm - 355gMaterial - Food-grade SiliconeWhat's in the box 4 x Collapsible Silicone Food Storage Containers 4 x Lids