I received the 18-Piece Storage Container Set, Clear and washed them and used them immediately. They are perfect! I love how it comes in 18-piece set and even the color of the rubber seals make it an attractive set. Now, the lock on them is outstanding!! They click with a tightness for that extra security. Its definitely a tight seal and kept all my foods fresh even after a few days. Its a great product in my opinion and I highly recommend this product! I absolutely will continue to purchase them in the future.