If you pay attention, you will find that the shampoo bottle hasn't changed much, but shampoo bottle caps are constantly changing. The original shampoo bottle cap is a common spiral plastic cap, and more and more shampoo caps later use butterfly caps. Indeed, butterfly caps are more convenient when using squeezed shampoos. Now, all types of extrusion pump heads have become the latest method of shampoo caps. Compared with other caps, the squeeze pump head is easier to control and more convenient. The development and change of shampoo bottle caps is constantly moving towards humanity. This is because other caps in the cap design process are worth learning. At present, many domestic bottle cap designs are very traditional and have little change and need continuous improvement. However, there are still some deficiencies in the currently shampooed shampoo bottle caps that need to be improved. Squeeze pumps are sometimes inconvenient for extrusion and need to be more reliable.