Enamel cup

The core of a high-quality enamel cup is cold-rolled steel, typically with a thickness of 0.4mm to 0.6mm to ensure durability without being overly heavy. The surface must be coated with inorganic glass enamel, which is fused to the metal at temperatures between 800°C and 850°C. Buyers should ensure the rim is either stainless steel wrapped or double-glazed to prevent chipping and rusting, which are common failure points in low-end products.

Since enamel cups are food-contact materials, they must meet strict chemical leaching standards. For the US market, compliance with FDA 21 CFR 175.300 is essential. For the EU, products must adhere to LFGB (Germany) or Regulation (EC) No 1935/2004, specifically testing for lead and cadmium migration. Always request SGS or Intertek lab reports dated within the last 12 months to verify these safety benchmarks.

There are two primary methods: Silk screen printing and Decal paper (High-temperature firing). For B2B buyers looking for longevity, high-temperature decals are superior because the logo is fired into the enamel glaze, making it scratch-resistant and dishwasher-safe. Silk screen is cheaper but prone to peeling. Ensure the supplier uses lead-free pigments for all external decorations to maintain overall product safety.

Enamel cups are ideal for camping, outdoor activities, and vintage-style cafes due to their shatterproof nature and heat conductivity. However, they are strictly prohibited for use in microwave ovens because of the inner metal core. They are compatible with gas stoves, induction cooktops, and campfires, which is a significant selling point for the outdoor gear market.

The biggest risk is enamel chipping due to impact during transit. Unlike ceramic, enamel is prone to 'spider-web' cracking if the boxes are dropped. Buyers should insist on 5-layer corrugated export cartons and individual bubble wrap or white box packaging. It is highly recommended to conduct a ISTA 1A Drop Test before the shipment leaves the factory in China.

Standard enamel cups usually have an MOQ of 500 to 1,000 pieces for custom colors. To optimize costs, ask for 'stock colors' (usually white, cream, or black) where you can print logos with an MOQ as low as 100 pieces. When negotiating, focus on the unit weight and glaze thickness rather than just the lowest price, as 'cheap' enamel often has thin spots that rust quickly.

Utilize Secured Trading Services provided by platforms like Made-in-China.com to ensure payment is only released after the goods pass inspection. For large volumes, hire a third-party inspector (like V-Trust or QIMA) to perform a During Production Inspection (DPI) to check for glaze consistency and a Final Random Inspection (FRI) to verify quantity and packaging integrity.

Due to the relatively high weight-to-value ratio, Sea Freight (LCL or FCL) is the most economical for orders over 500kg. For smaller trial orders, Sea + UPS/FedEx (Matson/ZIM routes) offers a balance of speed and cost. Ensure the HS Code 7323.94 (Table, kitchen or other household articles of iron or steel, enameled) is used correctly to avoid customs delays and ensure accurate duty calculation.