Brown bottles

Brown or amber glass is essential for UV protection. It filters out blue and ultraviolet light, which can cause photo-oxidation. This is critical for maintaining the chemical stability and shelf life of light-sensitive products such as essential oils, pharmaceuticals, and craft beers.

For pharmaceutical or food use, ensure the glass is Type I, II, or III borosilicate or soda-lime glass depending on the reactivity of your product. For plastic alternatives, Amber PET or HDPE is common. Always verify FDA or EC food-grade certifications and BPA-free status for plastic variants.

The closure must match the application: Dropper caps for essential oils, Phenolic caps for aggressive chemicals, or Tamper-evident seals for pharmaceuticals. Ensure the neck finish (e.g., 18/410, 24/410) matches the cap precisely to prevent leakage and evaporation.

Check for wall thickness uniformity to ensure thermal shock resistance. Inspect for defects like bubbles, stones, or 'birdswings' (thin glass threads inside). High-quality suppliers on Made-in-China.com will provide annealing certificates to prove the glass has been properly cooled to prevent spontaneous breakage.

Request 5-layer corrugated export cartons with honeycomb dividers. For large orders, insist on palletization with shrink wrap and corner protectors. It is highly recommended to include a breakage allowance clause (typically 2-3%) in your contract and use SGS pre-shipment inspections.

Focus on mold costs and MOQ. If you require a custom shape, negotiate for the mold fee to be refunded once your cumulative order reaches a certain volume. For standard bottles, leverage volume-tiered pricing; increasing an order from 5,000 to 20,000 units can often reduce the unit price by 15-25%.

Utilize the Secured Trading Service on Made-in-China.com to protect your payments. Always verify if the supplier is an Audited Supplier, which confirms their production capacity, business license, and quality control systems have been verified by third-party agencies like SGS or Bureau Veritas.

Be aware of Anti-Dumping Duties (ADD) that some countries impose on glass containers from specific regions. Confirm the HS Code (typically 7010.90) with your customs broker. For shipping, Sea Freight is most economical for glass due to weight, but ensure the container is moisture-controlled to prevent 'glass bloom' or weathering during long transit.