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A bottle of contact lens solution is typically used for a period of three months since its first opened. But many people will often forget or can`t find a easy way to record this time, so they would most likely use expired drugs, this may cause a serious health problems.
This design leads to a better reminding of how long this bottle of contant lens solution can be used.
The bottle labels was imprinted with the color-changing materia. When you first started using the Soaking solution, torn the label, it will becomes blue over time. You can`t use this Soaking solution until three months later when the lable was barely recognizable.