From the manufacturer: Airtight & Leakproof lids: 4 locking tabs to keep food fresh. Meal prep solutions: Ideal for cut fruits, veggies, and on-the-go meals. Write-and-Erase: When the container is empty, simply wipe off the writing with a soft cloth. It’s that easy! Product Description: In smaller sizes, these round glass containers and secure lids will keep your snack items organized. A snap-on lid ensures an airtight, leak-proof seal, and a Write + Erase label makes it simple to keep track of what’s inside. 16-PIECE SET: Set includes (4) 2-cup, and (4) 1-cup round plastic containers with lids. These are the perfect containers for meal prepping or storing, and ideal for work, school and home. They also resist stains, odors, and flavors. HIGH QUALITY: Made from lightweight and durable BPA-Free plastic, these Snapware containers are an indispensable addition to your storage and organizing needs. The containers and lids stack to save space, so you can put them away neatly until needed. NON-TOXIC LIDS: These Snapware containers feature airtight, leak-proof lids with 4 locking tabs that are BPA-free. They're also top-rack dishwasher, freezer and microwave safe. LABEL YOUR FOOD: Built-in Write + Erase label on lids provide convenience and fun. When you have too much stuff, or just need to make sure that everyone knows which container belongs to you, simply write on the lid to avoid any confusion. LIMITED WARRANTY: This item has limited warranty. Made in USA