What is a Glass Qube Jar?
The Glass Qube Jar (square glass jar) is a precision storage container made of high-purity soda-lime glass. Its unique cubic structure and excellent preservation properties make it widely used for preserving concentrates such as cannabis extract oils and cosmetic creams. Compared to traditional round glass jars, its square design increases storage space utilization by up to 40%. Combined with its patented child-resistant cap (CR certified), it is the preferred professional storage solution,Here is a complete guide to glass qube jar.

Analysis of Core Technologies for Fresh-Preservation and Storage
UV-Coated Jar Body’s Light Protection Mechanism
The Glass Qube Jar utilizes titanium (Ti)-doped quartz coating technology, achieving superior UV blocking through the following triple protection:
Spectral Filtering: Filters >99% UV-C wavelengths between 200-280nm, and blocks 98% UV-B wavelengths below 320nm.
Coating Parameters: Thickness controlled at 10-12μm, vacuum-coated, with adhesion tested to 50N/cm².
Light Transmission Balance: Visible light transmittance ≥90%, ensuring visibility while shielding harmful rays.
Vacuum Child-Resistant Lid Design Principle
The lid features a double-layer nesting structure and a “press + twist” dual-action opening mechanism, meeting multiple international certification standards:
Safety Certifications: ISO 8317, ASTM According to D3475 testing, 85% of children (42-51 months) were unable to open the device within 5 minutes.
Sealing Performance: Silicone sealing ring with screw-lock design achieves a vacuum of -0.08 MPa and a leakage rate of <0.1 cc/day.
Durability Test: After 500 opening and closing cycles, the sealing performance retention rate remains ≥90%.
Glass Qube Jar Buying Guide
Core Parameter Comparison
| Capacity Specifications | Applications | Material Certification | Price |
| 3ml/5ml | Cannabis Extract Oil | CE/FDA | 0.2-1 usd/PCs |
| 7/9ml | Cosmetic Essence | LFGB, REACH | 0.2-1.5 usd/ PCs |
| 15ml | Medicinal Paste | ISO 9001,ROHS | 0.2-1.5/PCs |
5-Step Quality Verification
- Coating Inspection: Authentic products should exhibit a uniform blue-purple reflection when illuminated with a UV flashlight.
- Sealing Test: Inverted and squeezed underwater; no bubbles should form.
- Certification Marking: The inside of the cap should be marked with the CR certification number (e.g., ISO 8317-2021).
- Material Verification: The can should make a crisp, no creaking sound when tapped.
- Vacuum Storage: When the cap is tightened, a popping sound is heard. This is the spring element in the cap springing up, expelling the air and creating a near-vacuum state.

Multi-Field Application Practices
Hemp Extract Oil Storage Solution
Laboratory data shows that using the Glass Qube Jar to store CBD oil:
Terpene Retention: ≥85% over 6 months (conventional containers only 62%)
Oxidation Control: Combined with nitrogen exchange technology, THC degradation can be controlled to 0.3%/month
Optimal Storage Conditions: 15-25°C, dark environment, 50-60% relative humidity
Cosmetic Cream Preservation Case Study
Tests conducted by a cosmetics brand showed that under the same storage conditions:
Niacinamide Stability: Using the UV-protective Qube Jar increased activity retention by 40%
Potential Contamination Resistance: Passed ISO 11607 antibacterial testing, with a microbial limit of <10 CFU/g
User Feedback: 92% of consumers believe the product’s shelf life is significantly extended.
Analysis of the EasyJar Brand Advantages
As a professional manufacturer of Glass Qube Jars, EasyJar has established a leading position in the market through the following advantages:
Technological Innovation: In triangular, square, hexagonal, and octagonal Qube Jars, EasyJar offers a wide range of solutions for the preservation of nicotinamide. Jar utilizes its own R&D and innovation capabilities, sells globally, and has obtained patent certification for its products. It also operates its own glass jar R&D and production lines. Environmentally friendly: Using PCR recycled glass reduces the carbon footprint by 34% compared to traditional processes. Custom services: We offer silk screen printing, hot stamping, UV printing, gold/silver foil, and other surface treatment options.

Usage and Maintenance Tips
Cleaning and Disinfection Procedures
- After removing the lid, soak in hot water (over 60°C) and a neutral detergent for 20 minutes.
- Ultrasonic cleaning (500W) for 3 minutes to remove stubborn residue.
- Keep the drying temperature below 80°C to prevent coating degradation.
Reuse and Modification Suggestions
Essential Oil Blending Jar: Silicone stoppers can store essential oil blends for over 6 months.
Specimen Storage: For tissue sample storage, with transmittance sufficient for microscopic observation.
Laboratory Sample Aliquot: The 5ml size is suitable for sample pretreatment for HPLC analysis.
Industry Standards and Certifications
The Glass Qube Jar must meet multiple international standards:
Material Safety: FDA 21 CFR 177.2000, Requirements for Glass Products
Child Safety: 16 CFR §1700.20 (US), EN 14375 (EU)
Environmental Safety: EU ECOLABEL certified, ≥95% recyclable
FAQ of guide to glass qube jar
What are the core design features of the Glass Qube jar?
It utilizes a cubic, high-purity soda-lime glass structure, integrated with a 10-12μm UV spray coating (99% UV-C blocking rate) and a vacuum, child-resistant lid (ISO 8317 certified). This increases storage space utilization by 40% compared to round jars.
How can I verify the product’s UV protection?
High-quality products will exhibit a uniform bluish-purple reflection when illuminated by a UV flashlight. Official test data shows a visible light transmittance of ≥90% while blocking 99% of carcinogenic UV-C wavelengths.
Is the child-resistant feature safety certified?
Yes, the lid is certified to ISO 8317:2021 and ASTM D3475. 85% of children aged 42-51 months are unable to open it within 5 minutes, and the seal retention rate is ≥90% after 500 openings and closings.
How can I choose between different capacity sizes?
Laboratory data shows that under a light-proof environment of 15-25°C, combined with nitrogen exchange technology, terpene retention is ≥85% over 6 months, and THC degradation is controlled at 0.3%/month (compared to traditional containers which only have a retention rate of 62%).
How should the container be cleaned and maintained during daily use?
After removing the lid, soak the container in 60°C hot water and neutral detergent for 20 minutes. Ultrasonic cleaning at 500W for 3 minutes is recommended monthly. The drying temperature should be kept below 80°C to prevent coating aging.
