Date marking function: Complementary food freezing containers have a date marking ring on the lid, including 31 numbers that cover the days of one month. Parents can mark the production date and shelf life through the rotating buckle above the lid to ensure freshness and avoid babies consuming expired food. Designed for busy parents, make preparing homemade baby food a breeze. Leak-proof design: the lid of the baby porridge freezing container is equipped with an integrated silicone sealing ring to ensure completely leak-proof and airtight, which keeps baby food fresh and nutrients locked. Perfect for storing breast milk, baby porridge, and snack for little ones. Freezer/microwave safe: made of durable and food-safe PP and TPE material, temperature resistance range: -20C, 120C. These baby porridge containers are microwave, freezer and dishwasher friendly. Each lid of the small food container is equipped with a unique silicone valve that allows you to heat the food by simply opening the vent valve instead of removing the lid. Marked with scale: the small cans with lids are designed with 4 scale values: 30 ml, 60 ml, 90 ml, 120 ml, so you can control the amount of feeding every time. A must-have for weaning babies for beginners mothers. In addition, the clear containers keep the food inside highly visible for convenient reach and management. Beautiful design, easy storage: package contains 6 x freezing containers, 1 storage compartment of the groove design. Their uniform size allows for neat stacking in the fridge or in the included storage compartment and saves space. The baby food storage containers have a cute and beautiful appearance with three different colours (grey, pink and blue), making them a great addition to baby food or snacks.