Product Introduction
Our Blue Plastic Bag-in-Box with Clear Tube is a reliable, hygienic packaging solution for milk and liquid dairy products.
The outer bag is made from high-strength blue polyethylene (PE), offering excellent puncture resistance and a distinctive brand appearance. The built-in transparent dispensing hose (clear PVC or silicone) lets operators and consumers see the liquid flow – making dispensing easy and spill‑free.
This bag-in-box system works with both aseptic and pasteurized filling. It keeps milk fresh without refrigeration during short-term logistics (or with cold chain for fresh milk). As liquid is dispensed, the bag collapses, preventing air backflow and oxidation.
Perfect for: cafeterias, school milk programs, hotels, and food service.
Specification Table
| Parameter | Details |
|---|---|
| Material | Blue PE (outer bag) + Clear PVC/silicone dispensing tube |
| Tube Transparency | Highly transparent, non‑toxic, kink‑resistant |
| Capacity | 3L, 5L, 10L, 20L, 22L (customizable 1L – 30L) |
| Tube Length | 15 – 40 cm (customizable) |
| Tube Inner Diameter | 6 – 12 mm (for standard milk flow) |
| Fitment / Connector | Integrated screw cap or push‑fit connector (sterilizable) |
| Oxygen Barrier | Moderate – suitable for fresh/pasteurized milk (7–21 days) |
| Food Contact Compliance | FDA, EU 10/2011, BPA‑free, phthalate‑free |
| Sterilization | Gamma irradiation available (for aseptic filling) |
| Outer Carton | White or brown corrugated box with pre‑cut tap hole |
| Operating Temperature | 0°C – 60°C (refrigerated or ambient) |
Key Advantages
✅ Visual Flow Control – The transparent tube lets users see milk flow, preventing spills and ensuring accurate dispensing.
✅ Blue Plastic Design – Gives products a clean, dairy‑associated appearance. Also hides minor scratches and improves brand recognition.
✅ Air‑Free Dispensing – The bag collapses as milk is drawn out, eliminating oxygen contact and preserving taste.
✅ Easy to Use – No need to lift or tilt the box. Simply attach the tube clip or valve.
✅ Space‑Saving – The flexible bag fits neatly into a box, reducing storage and shipping volume by up to 60% compared to rigid containers.
✅ Recyclable – The outer cardboard box is fully recyclable. The plastic bag can be recycled in appropriate facilities.
Application Scenarios
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🥛 Fresh Milk – Pasteurized or ESL milk for cafeterias, restaurants, and catering
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🌾 Plant‑Based Milks – Soy milk, oat milk, almond milk, rice milk
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🍶 Liquid Yogurt & Lassi – Drinkable yogurt, buttermilk, kefir
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☕ Coffee Creamers – Single or bulk creamer for coffee shops
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💧 Other Beverages – Juice, iced tea, coconut water (with appropriate barrier upgrade)
FAQ
Q1: Is the transparent tube safe for contact with milk?
A: Yes. The tube is made from food‑grade clear PVC or silicone – both are non‑toxic, BPA‑free, and comply with FDA and EU food contact regulations.
Q2: Can this bag‑in‑box be used for aseptic filling?
A: Yes. We can supply pre‑sterilized (gamma irradiated) bags with aseptic connectors. Please specify your filling machine model.
Q3: How long does fresh milk stay fresh inside this bag?
A: For pasteurized milk (refrigerated): 7–14 days. For UHT/aseptically filled milk (ambient): up to 6 months with proper barrier film. Our standard blue plastic bag is optimized for chilled distribution;
for longer shelf life, we recommend adding an EVOH layer.
Q4: Can the tube be cut to a shorter length?
A: Yes. The tube can be trimmed to your desired length. A reusable clamp or flow stop is included to control dispensing.
Q5: What box sizes are available?
A: We supply corrugated boxes matching bag capacities (3L, 5L, 10L, 20L, 22L). Custom printing with your logo is available (MOQ 3000 boxes).
Q6: Is there a minimum order quantity (MOQ)?
A: Samples: 100 bags. Standard MOQ: 2000 bags per size. Tube length and color customization require MOQ of 5000.
