Freezer safe. Stack-lock-store BPA free. Watching what you eat? Great for small portion meals and leftovers. On-the-go snacks. Cereal, nuts, trail mixes, smoothies. Delectable Desserts: Pudding, layered dessert and fruit salad. Fresh Fruit Creations: Freezer jam, chutney and fruit sauce. Savory Sauces and Dips: Marinara, pesto and salsa. Twist-On Lids: Seal in freshness. BPA free. Won't Collapse: More durable & convenient than plastic bags. Stackable: Jars lock together for a tidy freezer. Fill Line: Allows space for food to expand during freezing. Dishwasher safe - top rack only. Made in China.