A diaper bag, nursery or home must have to store, dispense and organize items. Get smart and get organized with our stacking and interlocking containers. Each container can be securely stacked together until ready to use with our patented secure-click system. To access the container in need, simply press the oval imprints on each side. The removable funnel shaped inner lids make dispensing easy and harder to spill the entire contents. Stack as few or as many containers as needed with our interchangeable lid, base and containers. Each container holds approximately 1/3 cup or up to 4 scoops of powdered formula for a full 8 oz. feeding. Not suitable for liquid storage. Packin' SMART stackable cups are dishwasher safe. They are BPA free, Phthalate free, PVC free, and Lead free. The high quality Tritan is made in the USA – product is manufactured in South Korea. This line comes in many different colors and can be purchased in 2, 3, 4 and 5 cup increments. All are available on Amazon.com.Care & Use - Handwashing is recommended. Top-rack dishwasher safe. Dishwasher sanitization mode not recommended. Sterilization: Minimize sterilization and avoid extreme temperature change to extend product life cycle. Dishwasher Safe - Handwashing Recommended