Dual chamber airless bottle could help you with more designs of formula. To put two formulas separately in two tubes, then pump them out togethe
| Item | Capacity | Height | Diameter | 
| AB217-30f | 15mlx2 | 120mm | 64mmx39mm | 
| AB217-60f | 30mlx2 | 169mm | 64mmx39mm | 
| Pump: | airless | 
| Cap: | AS | 
| Outer Bottle: | AS | 
| Inner Bottle: | PP |