Can I put the sample directly into the large bottle of lotion and lotion I use without washing it?

No. The lotion can be filled with a clean needle when filling the bottle, so it cannot be left unwashed. Samples, that is, cosmetic trial packs, are a strategy for brands to explore the market and attract customers. Since the ingredients are the same as formal wear, samples can help consumers reduce the cost of selecting products. They are also small and easy to carry, making them a popular choice for many business travelers. First choice.