• Adopt the United States FDA food grade material (BPA free),
    compliant with the European EN71 toxicity test standards
    and heavy metals free. Antibacterial materials inner wall.
    Aseptic ultrasonic wave workshop of production and manufacture,
    hot-wave heat, glue free, eliminated any toxic substances,
    naturally decomposed in the earth, which will help children
    developing the concept of environmental
    protection from an early age.