The glass bottle quick connect adapter is used to connect the glass bottle to the soda machine, so you can easily get carbonated drinks without wasting constantly changing plastic bottles. CUSTOMIZABLE: Create the with the crystal 0.7 liter glass bottle of . Easy installation: Just screw the soda bottle adapter onto the glass bottle threads and connect to the soda machine. Warm Tips: With this adapter, you can continue to use traditional screw valve CO2 glass bottles. HIGH QUALITY MATERIAL: The glass bottle quick connect soda maker bottle attachment is made of high quality plastic, and 't rus Colour: black Material: plastic Package Contents: 2 sets of soda bottle adapters Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.