These appear to be refillable white plastic airless pump cosmetic bottles, commonly used for lotions, serums, and liquid foundations.How to Use and Refill Airless Pump BottlesPrime the pump: New or freshly refilled bottles may take a few extra presses to push air out and draw the product up.Push the base disk down: When refilling, use a clean thin stick or straw through the bottom hole (if present) or push the internal piston disk back down to the bottom before adding new product.Avoid overfilling: Leave a small gap at the top so the pump mechanism fits securely without overflowing.If you'd like, let me know:

