Oven-safe Glass Food Storage Set helps optimize meal-prepping and portion-control needs this upcoming year to achieve nutrition and health goals. The containers have high-endurance to sudden temperature changes thanks to the BPA-free Borosilicate glass containers with polypropylene lids. Meanwhile, multiple sizes and locking lids make it convenient for meal prepping individuals to portion control at night and take the containers on-the-go in the morning. The snap-locking airtight lids in either high-quality plastic or bamboo help maintain the freshness of any enclosed food, ensuring that on-the-go errands don?t need to jeopardize brunch, lunch, or dinner?or your fitness goals.