Wholesale & Custom Serum Bottles | Premium Packaging Manufacturer

The dropper is the primary tool for interacting with your serum, and its performance is determined by the synergy of its components. A common oversight is failing to match the dropper’s materials and design to the specific properties of the serum formula.

• Bulb Material Matters: The rubber bulb is not one-size-fits-all. Nitrile (NBR) is a robust, cost-effective choice for many standard formulas. However, for certain essential oils or aggressive ingredients, Silicone offers superior chemical resistance and prevents the bulb from softening or degrading over time.
• Pipette Calibration & Tip Design: The glass or plastic pipette can be calibrated with markings for precise dosage. More importantly, the tip’s shape (e.g., pointed, rounded) can be optimized to control the drop size and dispensing speed, a crucial detail for different serum viscosities.
• Compatibility Testing is Key: We strongly recommend testing your final formula with the complete dropper assembly to ensure there is no material interaction, and that the suction and dispensing action is smooth and consistent.

That small plastic or silicone insert sitting in the neck of your serum bottle is called a “wiper,” and it’s one of the most critical components for a clean, premium user experience. Its absence is a hallmark of low-cost packaging.

• Prevents Messy Drips: The wiper’s primary function is to clean excess serum from the outside of the glass pipette as it is withdrawn from the bottle. This prevents product from dripping down the side of the bottle or onto the user’s hands.
• Ensures Dosage Control: By removing excess product, the wiper helps ensure that only the serum inside the pipette is dispensed, leading to more accurate and consistent dosage.
• A Premium Feel: A clean, drip-free application is a small detail that significantly elevates the perceived luxury and quality of your product.

While it’s common knowledge that dark glass protects formulas, not all dark glass is the same. The specific color of the glass determines which spectrums of light are blocked, a critical consideration for different types of active ingredients.

• Amber Glass: The industry standard, offering excellent, broad-spectrum UV protection, ideal for a wide range of light-sensitive natural and chemical ingredients.
• Cobalt Blue Glass: While visually striking, it primarily absorbs yellow and red light, offering less protection in the UV spectrum compared to amber. It’s more of an aesthetic choice for less sensitive formulas.
• Violet Glass (Miron Glass): The premium choice. This specialized glass blocks the entire spectrum of visible light except for violet and UV-A light. This unique property is believed to energize and preserve the potency of high-end, preservative-free, or bio-active formulations.

“Headspace” is the empty space left between the top of the serum and the bottom of the cap after filling. While some headspace is necessary for thermal expansion, excessive oxygen trapped in this space can be the primary cause of oxidation and reduced shelf life for sensitive serums.

• Right-Sizing Your Bottle: Choosing a bottle size that closely matches your product volume (e.g., using a 30ml bottle for a 30ml product, not a 50ml bottle) is a critical first step to minimize headspace.
• Optimized Filling Levels: During production, we help determine the optimal fill level that balances the need for expansion room with the goal of minimizing trapped oxygen.
• Consider Airless Alternatives: For extremely oxygen-sensitive formulas (like potent Vitamin C or Retinoids), this inherent risk is why an Airless Pump Bottle is often the superior technical choice, as it eliminates headspace entirely.