Below are reputable international packaging manufacturers that commonly hold the major global certifications (ISO 9001, ISO 14001, GFSI/BRC/SQF for food, FSC/PEFC for fibre, ASI/ISCC/ISCC‑Plus for recycled content, plus industry GMP/FDA where relevant) and are set up to handle large / bulk orders. I’ve listed the typical certifications each company highlights and why they’re a good choice for bulk / international supply. (You’re in Germany — I note several have European plants and EU/UK food‑safety and sustainability credentials.)

1. Amcor (global — flexible, rigid plastic, specialty, pharma & food)

• Typical certifications and credentials: ISO 9001, ISO 14001, GFSI‑recognized food safety schemes (many sites), Aluminium Stewardship Initiative (ASI) material/chain‑of‑custody at some aluminium sites, ISCC/ISCC‑Plus at selected sites for circular feedstocks. Amcor publishes facility certificates and sustainability credentials. (packagingsolutions.Amcor.com)
• Why choose them for bulk orders: very large global footprint (many European plants), experience with large FMCG and pharmaceutical contracts, mass‑balance and recycled feedstock programmes for scaled supply.

2. Tetra Pak (cartons and processing systems — beverages & liquid food)

• Typical certifications: FSC (paperboard chain‑of‑custody for cartons), ISO standards, comprehensive food‑safety and supply‑chain sustainability programmes; long track record with food‑contact compliance and international regulatory alignment. (en.wikipedia.org)
• Why choose them for bulk orders: specialist for aseptic cartons and large beverage/food runs, strong upstream raw‑material controls and global logistics for high‑volume supply.

3. Smurfit Kappa (paperboard & corrugated — boxes, cartons, industrial packaging)

• Typical certifications: FSC and PEFC chain‑of‑custody at many mills, ISO 9001 / ISO 14001 across plants, strong sustainability reporting and regional certification coverage. (Smurfit Kappa is widely used in Europe for bulk carton/transport packaging.) — see company sustainability pages and FSC sourcing statements. (packagingstrategies.com)
• Why choose them for bulk orders: deep European network of mills and converting sites (short lead times inside EU), strong recycling and fibre‑certification coverage.

4. Berry Global / Berry Healthcare (plastic packaging — pharma, healthcare, consumer)

• Typical certifications: ISO 9001, ISO 14001 at many sites; ISCC/ISCC‑Plus at selected sites for circular content; GxP/GMP and food‑contact certifications where relevant; facility certificate pages available. (packagingsolutions.Amcor.com)
• Why choose them for bulk orders: specialised in high‑volume healthcare and consumer packaging, formal documentation portals for facility certificates (useful in procurement).

5. ALPLA (Austria; global plastics & closures)

• Typical certifications: ISO 9001 and ISO 14001 widely implemented across plants; large European manufacturing base (helps with EU compliance & logistics). ALPLA is commonly used for high‑volume beverage, food and household packaging. (paupacking.com)
• Why choose them for bulk orders: strong European production footprint, expertise in closures and blow‑moulding at scale.

6. Gerresheimer (Germany — glass and speciality pharma packaging)

• Typical certifications: ISO 9001, GMP / pharma‑specific standards and FDA/EMA compliance on many product lines, plus supply to regulated pharma markets. (paupacking.com)
• Why choose them for bulk orders: ideal when you need pharmaceutical‑grade vials, ampoules, or speciality glass in certified, traceable bulk lots.

7. Mondi (paper, flexible packaging, corrugated)

• Typical certifications: FSC/PEFC chain‑of‑custody, ISO 9001/14001 at many sites; broad international presence for paper/fibre packaging. Good for large runs of paper bags, sacks, corrugated. (Mondi corporate sustainability & certification pages). (pulpapernews.com)

How to pick the right supplier and verify certificates (recommended next steps)

• Identify the exact product family (rigid plastic bottles / closures / flexible film / cartons / corrugated / glass / pharma vials) and target annual quantity — that narrows which of the above are suitable.
• Ask each supplier for: (a) copies of the specific plant’s ISO / GFSI / FSC / ISCC / GMP certificates (not just corporate claims), including scope and expiry dates; (b) evidence of food‑contact or pharma‑grade compliance where relevant (EU food contact regulations, FDA letters, GMP certificates); (c) lead time, MOQ, tooling costs and capacity for your required delivery schedule.
• Verify certificates: certification bodies and certificate numbers should be on the documents — you can validate on the certifier’s registry (e.g., TÜV, SGS, DNV, BSI registries) or request the certifier contact. For FSC/PEFC/ASI/ISCC, validate on the issuing scheme’s public databases.
• Logistics & regulatory fit: for EU deliveries from Germany, ensure the plant you choose has EU export/import documentation and EORI, and confirm compliance to EU packaging and (if food) EU food‑contact rules and PPWR / extended producer responsibility expectations if relevant.

If you’d like, I can:

• Prepare a short RFP template (certificate checklist + commercial questions) you can send to selected suppliers.
• Search and return verified certificate links for 2–3 named suppliers and specific plants (I’ll validate certificates and list expiry dates) — tell me which 2–3 companies you want verified.

Sources and reading used above (examples of company pages / news / certificate portals):

• Amcor facility & certification info and ASI / ISCC announcements. (packagingsolutions.Amcor.com)
• Tetra Pak sustainability / FSC sourcing and corporate profile. (en.wikipedia.org)
• Berry Global / Berry Healthcare facility ISO & ISCC announcements. (packagingsolutions.Amcor.com)
• Industry sources and supplier lists (overview of major packaging OEMs). (paupacking.com)

Would you like the RFP template or certificate verification for specific plants (I can check current certificate PDFs and expiry dates for the facilities you name)?