About the aluminum packaging….
Why should you fill the bottle only with the same Kérastase Bain?
We recommend that, in each bottle, you only apply the indicated shampoo since the sustainable packaging has been developed to ensure that the formulas remain unchanged over time. The formula may be compromised if you apply another shampoo in the same bottle.
How do you clean the bottle between each filling?
We recommend that you wash the aluminum bottle after it is empty to ensure that it remains clean and reusable. Then you need to let the bottle dry before refilling it to prevent bacteria from growing.
Should I wash the refillable aluminum bottle pump between refills?
The pump does not need to be washed between refills, but we suggest that you clean it to remove excess formula.