PET bottles come in every imaginable size — from tiny 100ml sample bottles for hotels and airlines to massive 20L containers for water coolers, edible oil, and industrial liquids. Each size demands different mold geometry, cooling characteristics, and blow ratio optimization. That is why Gutewei offers custom capacity molds covering the entire spectrum: 100ml to 20L PET bottle tooling — all from a single, trusted manufacturer.
One Supplier for Every Bottle Size
| Bottle Volume | Typical Application | Gutewei Mold Feature |
|---|---|---|
| 100ml – 500ml | Hotel amenities, juice shots, sample sizes | High cavitation, compact mold base |
| 0.5L – 1L | Personal water, carbonated drinks | Standard cavity, fast cycle |
| 1.5L – 2L | Family size water, CSD, juice | Reinforced neck, balanced cooling |
| 3L – 5L | Table water, edible oil | Heavy wall design, thick base support |
| 5L – 10L | Water cooler bottles | Handle integration, reinforced bottom |
| 10L – 20L | Industrial containers, bulk oil | Large cavity, extended cooling zone |
No matter your target capacity, Gutewei designs a small to large bottle blow mold specifically optimized for that volume range.
What Changes When Bottle Size Changes?
Designing a blow mold for 100ml vs. 20L is not simply scaling up. Different sizes present完全不同挑战:
1. Blow Ratio (Stretch Ratio)
Small bottles (100ml–500ml) typically have higher stretch ratios, requiring precise preform shape matching. Large bottles (5L–20L) have lower stretch ratios but require more material flow control.
Gutewei calculates the optimal blow ratio for every custom capacity mold before cutting steel.
2. Cooling Requirements
Small bottles cool quickly but require uniform cavity temperature to avoid warpage. Large bottles retain heat longer, needing extended cooling channels and higher water flow rates.
| Bottle Size | Cooling Challenge | Gutewei Solution |
|---|---|---|
| 100ml–500ml | Over-cooling risk | Zoned cooling, flow reducers |
| 1L–5L | Balance speed and quality | Conformal cooling channels |
| 5L–20L | Heat removal bottleneck | High flow circuits, extended cooling time |
3. Neck Ring Design
Bottle neck finish is often standardized, but larger bottles may require reinforced neck rings to support heavier contents. Gutewei offers:
PCO 1881 (0.3L–2L beverages)
38mm / 48mm (oil and wide-mouth, 1L–5L)
55mm / 63mm (water cooler and bulk, 5L–20L)
Custom neck finishes for any application
4. Cavity Surface Finish
Small cosmetic and premium bottles require high-gloss finishes (RA ≤ 0.02μm). Large industrial containers may prioritize durability over clarity. Gutewei matches surface finish to your end use.
Gutewei Custom Capacity Mold: Built for Your Exact Volume
When you order a custom capacity mold from Gutewei, we do not guess. We engineer around your specific:
Target bottle volume (exact ml or L)
Bottle shape (round, square, oval, handleware)
Neck finish (standard or custom)
Wall thickness profile (lightweight or heavy duty)
Production volume (low, medium, or high cavitation)
Blow molding machine (make, model, tie bar spacing)
Cavitation Options by Bottle Size
| Bottle Size | Typical Cavitation (Cavities per Mold) |
|---|---|
| 100ml – 500ml | 4, 6, 8, 12, 16 |
| 0.5L – 1.5L | 2, 4, 6, 8 |
| 1.5L – 3L | 2, 4, 6 |
| 3L – 5L | 1, 2, 4 |
| 5L – 10L | 1, 2 |
| 10L – 20L | 1 (single cavity) |
Technical Features Across All Sizes
For Small Bottles (100ml – 1L)
High cavitation (up to 16 cavities per mold)
Fast cycle times (as low as 2.8 seconds)
Precision neck finish for consistent capping
Compact mold base for smaller machine platens
For Medium Bottles (1.5L – 5L)
Balanced cooling for uniform wall distribution
Reinforced neck ring for carbonated or heavy contents
Handle integration capability (for 3L–5L oil bottles)
Stainless steel S136 for clarity and durability
For Large Bottles (5L – 20L)
Single or dual cavity for large shot weight
Extended cooling channels with high flow capacity
Heavy-duty guide posts and wear plates
Optional bottom blow or stretch rod configurations
Corrosion-resistant coating for long service life
Why Global Bottlers Choose Gutewei for 100ml to 20L Tooling
| Buyer Need | Gutewei Solution |
|---|---|
| One supplier for all bottle sizes | Full range 100ml to 20L capability |
| Custom volume not standard | Tailored cavity geometry for exact capacity |
| Small bottle high output | Multi-cavity (8–16) compact design |
| Large bottle thick wall | Extended cooling, heavy duty construction |
| Machine compatibility | Interface drawings before manufacturing |
| Export documentation | Complete shipping and customs support |
Application Examples
| Bottle Size | Customer Application | Gutewei Solution |
|---|---|---|
| 150ml | Hotel shampoo bottle | 12-cavity high gloss mold |
| 500ml | Carbonated drink sample pack | 8-cavity CSD-grade mold |
| 1.5L | Table water for restaurant | 6-cavity fast cycle mold |
| 3L | Edible oil jug | 4-cavity handleware mold |
| 5L | Water cooler bottle | 2-cavity reinforced base mold |
| 10L | Bulk cooking oil container | Single cavity heavy wall mold |
| 20L | Industrial chemical container | Single cavity corrosion resistant mold |
Ready for a Mold in Your Exact Bottle Size?
Do not settle for a standard size mold that almost fits your bottle. Get a small to large bottle blow mold from Gutewei — a custom capacity mold precisely engineered for your 100ml to 20L PET bottle tooling needs.
Contact Gutewei today with your bottle drawing or sample. Tell us your target volume and production line. We will deliver a blow mold that fits your bottle — and your business — perfectly.
