1. Logo trademark: whether it is a manufacturer, or whether the company has a special trademark, and whether it supports barcodes (one of the standards for entering the market).
2. The appearance should be smooth, transparent, beautiful, without cracks, scratches and dirt; the cup body should be smooth without burrs that damage the skin; there should be no bubbles or stains in the cup body; mimeograph patterns and handwriting on the cup body Should be clear and beautiful.
3. The standard capacity is 300ml, and other capacities are 260ml and 360ml, with a tolerance of ±5%.
4. The sealing performance is whether it is leak-proof: after the lid is tightened, shake the drinking cup greatly, the cup is in any state, and the liquid in the cup does not leak.
5. Pour hot water into the lid and the cup and smell it without peculiar smell.
6. The sealing ring and the silicone sealing ring parts in contact with drinking water will not stick after being immersed in boiling water, and the appearance should not change significantly.
7. The match between the lid and the body: when the lid and body are screwed together, they should rotate freely, open and close flexibly, and there is no slippage.
8. Resistance to sudden changes in temperature: There should be no defects such as water leakage, cracks, breakage, etc. that affect the use when poured into boiling water.
9. Filter: the size is suitable for the cup body, it will not slide down, and the thickness meets the standard and is not easy to bend.
10. Packaging: beautiful appearance, carton, slightly better for handbag, gift box, hand-held gift box, good for mahogany box plus handbag.