FOOD GRADE SAFETY MATERIAL- Storage containers made of clear and durable PET plastic, BPA free, shatterproof, lightweight but sturdy, and can last a long time. CLEAR & STACKABLE DESIGN - The humanized pull handle allow you to easily pull the bins out, and select what you need without having to move everything. The clear plastic design makes it easy to see what is stored and find your food quickly. Easy To Access with Built-In Handle - Clear bins with built-in and easy-grip side handles make it easy to transport items; Getting things in the back of the frig a breeze. No more removing things one by one to get to things in the back. NOTICE TIPS - Even though these clear storage bins are very sturdy, Do not wash in the dishwasher, you can wash with soap in warm water (temperature range -20°C to 65°C). Do not use it in the microwave or oven either. If you have any questions or suggestions about refrigerator organizers, please contact us, we will give you a satisfactory solution within 24 hours. UCHUANG Home provides you with satisfactory customer service.