Our spout caps are injection-molded from food-grade PE/PP materials, with dimensional accuracy controlled by precision molds to ensure seamless compatibility with various flexible packages such as stand-up pouches, composite bags, and aluminum foil bags. The one-piece sealing structure, combined with a leak-proof lip design, effectively prevents liquid leakage. Whether for fruit juice, sauces, hair care liquids, or condiments, they deliver the convenient experience of "ready to suck with one opening, no leakage when inverted." Available in custom calibers (16 mm-38 mm), lengths, and thread specifications, they support surface treatments like matte or transparent finishes, balancing practicality with brand recognition—making them a core accessory for liquid flexible packaging.