Food glass

When sourcing food glass, you must prioritize High Borosilicate Glass for heat resistance (up to 400°C) and thermal shock stability, or Soda-Lime Glass for standard packaging. Ensure the glass is 100% Lead-free and Cadmium-free. For B2B buyers, it is critical to verify that the products meet FDA (US), LFGB (Germany), or EU 10/2011 food contact safety standards to ensure legal compliance in your target market.

The functionality of food glass often depends on the lid. Look for BPA-free polypropylene (PP) or natural bamboo lids equipped with food-grade silicone sealing rings. Request a leak-proof test report to ensure the containers are airtight, which is essential for extending food shelf life and preventing oxidation. For vacuum-sealed jars, check the integrity of the glass rim for any chips that could compromise the seal.

Focus on wall thickness consistency (ideally 2mm to 5mm depending on size) to prevent easy breakage. For industrial use, specify the annealing process quality to ensure internal stress is removed, making the glass more impact-resistant. If the product is intended for frozen-to-oven use, confirm a thermal shock resistance delta of at least 120°C.

Yes, most professional suppliers on Made-in-China.com offer customization. This includes silk-screen printing, laser engraving on lids, or decal firing for logos. For high-end brands, consider custom molds to create unique shapes, though this requires a higher Initial Mold Fee and a larger MOQ (typically 5,000+ units).

Glass is fragile, so you must mandate 5-layer corrugated export cartons and individual bubble wrap or EPE foam inserts. Request a Drop Test Report (ISTA 1A or 2A) from the supplier before shipment. It is highly recommended to purchase Marine Insurance and include a clause for a breakage allowance (usually 2-3%) in your contract.

Focus on Tiered Pricing based on volume; for glass, production efficiency increases significantly with run time, so discounts of 10-20% are common for full container loads (FCL). Always clarify the Incoterms (FOB is standard) and negotiate a 30% deposit / 70% balance against B/L payment structure to maintain leverage over quality.

Utilize Made-in-China.com’s 'Audited Supplier' reports to check the factory's production capacity and certifications like ISO 9001. Request a pre-shipment inspection (PSI) by a third party like SGS or Intertek to verify that the glass clarity, weight, and dimensions match your approved sample.

Glass is heavy and relatively low-value per kilogram, making Sea Freight (FCL or LCL) the only economically feasible option for bulk orders. Ensure the supplier uses fumigated wooden pallets for easy unloading and to comply with international phytosanitary regulations. For small trial orders, Air Freight is possible but will likely exceed the product cost.