What are the suitable storage conditions for beauty products?

Please refer to the handling (how-to-use) instructions listed on the product’s package. 

In general, cosmetic products will remain safe and fit for use for their expected life span provided they are stored under suitable conditions and are not subjected to extreme temperatures. To ensure their maximum durability, they should be stored in a cool dry place away from direct sunlight and with their lids firmly closed.

It is important to avoid contaminating the products during normal use; so hands should be clean before using these products.  Sharing of cosmetics is not encouraged as well.