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Trusted by global brands, 3lei.com delivers innovative, safe, and sustainable packaging — from breastmilk storage bags to oven roasting pouches and custom stand-up pouches.
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In 1997, founder Rongkang Chen believed that packaging was as essential as clothing — a necessity in everyday life. Together with two partners, he founded THREESTONE to manufacture high-quality plastic packaging solutions.
Today, we serve clients across the globe with a passionate commitment to innovation, safety, and sustainability. Our R&D team holds over 10 patents and continues to pioneer new packaging technologies — from odor-free milk bags to microwave-ready sterilizer pouches.
From baby care to food packaging and household solutions, we offer over 100+ specialized pouches and bags — all designed for safety, convenience, and sustainability.
Odor-free, BPA-free, with optional direct-pump adapter. Ideal for safe, long-term breastmilk freezing.
Customizable squeeze pouches for pureed baby food. Reusable and food-grade safe.
Sterilize baby bottles, pacifiers, and accessories in minutes using microwave heat.
Perfect for turkeys, chickens, and roasts. Locks in flavor and reduces cleanup time.
Eco-friendly packaging for coffee, snacks, pet food, and dry goods.
Ideal for liquids — juices, sauces, soups, and ready-to-eat meals.
Secure containment for medical waste, lab samples, and hazardous materials.
Extend shelf life of food with airtight vacuum sealing for freezer or sous-vide.
Seasonal printed OPP bags for candies, chocolates, and party favors.
All products undergo strict quality control and meet international food safety standards (FDA, EU, etc.).
Our R&D team continuously develops new solutions, including patented microwave sterilizer and odor-free milk bags.
From design to production, we support full customization — size, material, printing, and functionality.
Yes, all our breastmilk storage bags are BPA-free, phthalate-free, and made from food-grade LDPE material.
Absolutely. We offer full OEM services including custom size, material, zipper type, and full-color printing.
Yes, our kraft paper stand-up pouches are made from recyclable and compostable materials, ideal for eco-conscious brands.
Yes, we provide engineering samples and prototypes for approval before mass production.
We ship globally — North America, Europe, Asia, Australia, and South America.
Have questions about our products or need a custom quote? Reach out to our team today.
Phone: 0086-0592-5501369
Email: sales@3lei.com
Address: 117 Siming Yuan, Tong'an Muster Industrial Zone, Xiamen, China
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