Size and dimensions are:
Yellow container (350ml) : 13.5cm x 10cm x 3cm (folded) and 13.5cm x 10cm x 6.5cm (expanded)
Purple container (540ml) : 16.5cm x 11cm x 3cm (folded) and 16.5cm x 11cm x 6.5cm (expanded)
Green container (800ml) : 19cm x 12.5cm x3.5cm (folded) and 19cm x 12.5cm x7.5cm (expanded)
Red container (1200ml) : 21.5cm x 14cm x 3.5cm (folded) and 21.5cm x 14cm x 8cm (expanded)

What separates us from the competition?
1.Y.M.H lunch boxes are designed with fashion & built for function!
2.The secure, easy click lid makes sure you never have to deal with spills or messes.
3.The simple design and sturdy structure makes them ideal for all your on-the-go food needs, such as school, work, camping, hiking, road-trips, travel, and more.
4.Easy stacking, easy storage means no more lost lids.Ensure your lids stay where you can find them quickly with the easy-find lid system that keeps lids and containers snapped together and ready-to-use.
5.Collapsible lunch box nest together to 1/3 the expanded size to save space when not in use.
6.Great heat or cold resistance, suitable and safe for microwave, refrigerator and dishwasher using.
7.They're a versatile container and a must-have accessory for anyone who takes their lunch or other meals to go!
8.Available in four different colors, the bento boxes are great for both kids and adults.
Pack list: Set of 4 include One 350ml(color is random) , One 540ml (color is random), One 800ml (color is random), One 1200ml (color is random)

• Natural non-toxic harmless, non corrosive, safe, environmental protection
• VALVE DESIGN - Hot gas can discharge and water vapor will not form in the lunch box
• Better food storage - Can be put into the refrigerator, microwave heating
• After folding space saving, easy to carry
• Perfect for indoor food storage, outdoor activity

Natural non-toxic harmless, non corrosive, safe, environmental protectionY.M.H