Start fresh with these brilliant interlocking storage containers! Lock-Ups®, available in 4 sizes, give you the versatility to collect and arrange any collection. From craft supplies, to a rock collection, to pond water for biology class, these sturdy storage containers are equipped for the task. Made of clear, durable plastic, you can see your Lock-Ups®' contents quickly and easily, so you grab what you need efficiently. The interlocking base-lid system keeps your area orderly and helps you keep like-items together. Ideal for snacks, home, office, school, arts and crafts, workshop, and travel, these containers give you unparalleled fast, secure storage. Clear, tight-fitting lids interlock and stack to keep containers neat in a very small space. Stackable, interlocking storage containers provide handy solutions. Fast and secure storage. Durable, clear plastic containers. Twist-on lids for extra security. Go-everywhere containers are ideal for home, office, school, arts and crafts, workshop, and travel! Top-shelf /air dry dishwasher safe. Not oven or microwave safe.