【Premium Construction】Our sandwich containers are made of food safe 304 stainless steel and TPE , sturdy enough to resist daily wear and tear without cracking , ensuring long term use and reliability . They keep your food fresh and preserve its original flavor perfectly 【Multi Functional Design】This 4 piece set includes 2 single compartment containers and 2 double compartment containers . The single compartment style has a capacity of 650ml/23 oz , while the double compartment style holds 600ml/21 oz . These stainless steel sandwich containers offer a practical and stylish alternative to plastic , and are ideal for storing fruits , snacks , vegetables and more 【Silicone Lids with Vents】These containers allow you to easily sort and identify your food . The lids are made of soft food safe TPE with built in vents for enhanced convenience . Featuring a secure snap lock seal and integrated vents , they avoid spills while making it easy to enjoy meals on the go 【Designed for Daily Convenience】These food storage containers are dishwasher safe for quick cleaning and freezer safe for meal prepping in advance . They ensure your food stays fresh 【Wide Application】Compact and stackable , these food storage boxs with lids save space in your kitchen , refrigerator or food bag . They are suitable for meal prep , travel and picnics