... airtight 2.double layer,spoon and fork inside items NOMX-640NameDouble layer lunch boxDescriptionEco-friendly,leakproof,non-toxic,easy-using plastic double layer lunch boxmaterialPP ... . and has own technical personnel and manages to deal with pad printing,silk screen printing,and heat-transfer printing.2. our ... .3. more than 15 years manufacturing experience paper lunch box /double layer lunch box