1
                            
                            Cut welded pipe to correct length, 2 diameters for inner and outer walls
                             
                         
                                                
                            
                                2
                            
                            Shape bottle via our hydro-bulging process
                             
                         
                                                
                            
                                3
                            
                            Waterproof and thread features added with thread machine
                             
                         
                                                
                            
                                4
                            
                            Seal and secure the inner shell to the outer shell by automatic electric welder
                             
                         
                                                
                            
                                5
                            
                            Place bottles into vacuum chamber to remove any air between shells to create insulation function
                             
                         
                                                
                            
                                6
                            
                            Polish and clean mouth and body of bottles, and press fit bottom cover
                             
                         
                                                
                            
                                7
                            
                            First inspection: product quality control and insulation test
                             
                         
                                                
                            
                                8
                            
                            Brand via our Screen Printing or Laser Engraving machines
                             
                         
                                                
                            
                                9
                            
                            Final inspection: branding quality control
                            