Convenient lids: Plastic heart containers have durable hinged lids, which can avoid losing lids, and the small cups are easy to open and close. To make sure its sealing, please press every side of the edges when closing. Portable Size: Mini containers with lids volume is 1.5 oz /45ml, Perfect size for jello shots, all kinds of sauce, desserts, and slime. souffle cups are also used for toddlers' snacks, such as candies and chocolates. Heat & Froze Resistance: Portion cups use food grade plastic, so heart shaped containers can hold hot food and frozen in the refrigerator. If you need to put the hot liquid or food into the box, please close the lid after the content is cooled. Some ideas for you to put in plastic containers with lids: Jello shots, condiments, pudding, salad dressing, ketchup, mayo, peanut butter, gelatin, food sample, candies, yogurt, acrylic paint, chocolates, beads, medicine, paperclips,homemade body butter, slime, and all of the small items. Occasions: Meal planning, picnics, barbecues, parties, tasting events, condiments sub-package, birthday parties, graduation celebrations, bridal showers, baby showers, weddings, engagements, and all kinds of events.