Thank you for viewing. These are convenient for storing meat, vegetables, etc., in single-serving portions. They can be washed and reused many times. They are also excellent for freezing. There are 40 pieces in total: 4 pieces x 10. We can also accommodate larger quantities. 10 pieces: ¥2380 20 pieces: ¥3,980 30 pieces: ¥5,400 40 pieces: ¥6,000 50 pieces: ¥6,500 Please ask any questions before purchasing.