Capacity: 850ml/28oz

Size/weight: 10.1×7.2×19.3cm/360g

Carton : 54.5×54.5×22.5cm/0.067m³

QTY: 25pcs 

N.W./G.W.: 9.0/10.5kgs

1. Introduction: The Growing Demand for High-Capacity Insulated Tumblers

In recent years, high-capacity Insulated Stainless Steel Tumblers have become essential for professionals, commuters, and lifestyle enthusiasts who prioritize temperature-controlled beverages. The 28oz variant caters to users requiring larger volumes without sacrificing portability or convenience.

Key drivers for adoption include:

Sustained temperature retention for hot and cold beverages.

Ergonomic and portable design suitable for office desks, vehicles, and travel.

Sustainable alternatives to disposable cups, aligning with corporate social responsibility goals.

These tumblers seamlessly integrate double-wall vacuum insulation with sleek industrial design, providing both function and aesthetic appeal.

2. Core Concepts and Key Technologies

2.1 Double-Wall Vacuum Insulation

The double-wall vacuum system is central to high-performance tumblers. It consists of:

Inner liner: 304-grade stainless steel polished for corrosion resistance, taste neutrality, and hygiene.

Outer shell: Stainless steel exterior for durability and aesthetic quality.

Vacuum layer: Creates a thermal barrier, minimizing conduction and convection losses.

Critical aspects include vacuum integrity, wall uniformity, and proper lid sealing to ensure extended temperature retention.

2.2 Slip Lid Mechanism

The slip lid provides quick access while maintaining leak resistance:

Seal materials: Silicone or thermoplastic elastomers ensure a tight closure.

User ergonomics: Designed for one-handed operation during commutes or office tasks.

Durability: Maintains shape and sealing performance under repeated thermal cycling.

A well-designed slip lid reduces spillage and ensures consistent insulation.

2.3 Ergonomic Design

High-capacity tumblers require careful attention to ergonomics:

Tapered or contoured bodies for comfortable grip.

Textured finishes or smooth coatings balance visual appeal with handling safety.

Powder-coated or metallic surfaces increase scratch resistance while enhancing aesthetics.

These factors ensure usability and product longevity in professional and personal settings.

3. Product Structure, Performance, and Materials

3.1 Structural Overview

A 28oz insulated stainless steel tumbler typically includes:

Inner liner: Polished 304-grade stainless steel.

Outer shell: Stainless steel with powder-coated or metallic finish.

Vacuum layer: Maintains thermal separation.

Slip lid assembly: Secure seal with ergonomic opening.

Uniform wall thickness, precise lid alignment, and vacuum integrity directly affect thermal performance and reliability.

3.2 Thermal Performance

Hot beverages: Maintain temperature for 5–9 hours depending on ambient conditions.

Cold beverages: Preserve chilled state for 7–12 hours.

Insulation efficiency depends on vacuum quality, lid seal effectiveness, and material properties.

3.3 Ergonomics and Portability

Weight distribution ensures stability.

Smooth contours provide a secure grip.

Minimalist design supports professional and casual usage while maintaining aesthetic appeal.

4. Manufacturing Processes and Quality Control

4.1 Shell Fabrication

Deep drawing or hydroforming ensures uniform wall thickness.

Laser welding or seam sealing maintains vacuum integrity.

Dimensional inspections verify consistent lid engagement and product uniformity.

4.2 Vacuum Creation

Mechanical or thermal evacuation removes air between walls.

Vacuum integrity is verified through pressure decay, helium leak detection, and thermal retention tests.

Even minor vacuum compromise reduces insulation effectiveness.

4.3 Surface Finishing

Pre-treatment removes impurities and improves coating adhesion.

Powder coating or metallic finishing enhances scratch resistance, corrosion protection, and visual appeal.

Coating quality is validated via thickness, adhesion, and abrasion tests.

4.4 Lid Assembly

Slip lids are tested for tolerance, alignment, and gasket compression.

Materials are selected to withstand repeated exposure to hot and cold beverages without deformation.

5. Factors Affecting Quality and Performance

Vacuum integrity: Critical for consistent thermal retention.

Wall thickness and uniformity: Influences durability and insulation.

Surface coating quality: Determines scratch and corrosion resistance.

Lid seal performance: Essential for leak resistance and thermal efficiency.

Consistency in production: Ensures reliable performance across large volumes.

B2B buyers often prioritize these factors when evaluating suppliers for bulk orders or corporate gifting.

6. Common Issues and Mitigation

6.1 Reduced Thermal Efficiency

Causes: Compromised vacuum, lid misalignment, inconsistent wall thickness.

Mitigation: Vacuum integrity testing, strict assembly control, and proper lid engagement.

6.2 Surface Damage

Causes: Abrasion, impact, or harsh cleaning chemicals.

Mitigation: Durable coatings and non-abrasive cleaning methods.

6.3 Leakage

Causes: Worn or improperly seated silicone gaskets.

Mitigation: Gasket inspection, replacement, and proper lid use.

6.4 Lid Deformation

Causes: Excessive thermal cycling or force.

Mitigation: High-quality lid materials and careful handling.

7. Application Scenarios

7.1 Commuting and Travel

Slip lid enables one-handed operation.

Prevents spillage in bags or vehicles.

Maintains beverage temperature over extended periods.

7.2 Office Use

Minimalist, professional design fits desks and conference rooms.

Supports daily hydration and reduces disposable cup usage.

Enhances workplace wellness and productivity.

7.3 Corporate Gifts and Promotions

Custom finishes and branding options for B2B gifting.

Durable construction ensures long-term brand visibility.

Suitable for conferences, events, or client appreciation.

7.4 Outdoor and Recreational Activities

Portable, leak-resistant design for travel, hiking, or outdoor gatherings.

Durable coating improves grip and scratch resistance.

Encourages sustainable use by reducing disposable cup consumption.

8. Current Trends and Future Developments

8.1 Advanced Coatings

Hydrophobic, anti-microbial, or textured coatings enhance hygiene and grip.

Differentiates products in competitive markets.

8.2 Modular and Smart Designs

Interchangeable lids and components extend product lifecycle.

Optional digital temperature indicators for premium variants.

8.3 Sustainability Initiatives

Increased use of recyclable materials and energy-efficient manufacturing.

Aligns with corporate social responsibility and environmentally conscious consumers.

8.4 Enhanced Thermal Performance

Research into improved vacuum insulation and nanocoatings may extend temperature retention.

Integration with smart thermoregulation devices may become a premium feature.

9. Conclusion

The 28oz insulated stainless steel tumbler with slip lid combines thermal engineering, ergonomic design, and material science to deliver a high-performance, portable, and aesthetically pleasing beverage container. Its double-wall insulation, secure slip lid, and minimalist design make it suitable for B2B procurement, corporate gifting, daily hydration, and travel. Proper attention to vacuum integrity, lid sealing, and surface durability ensures reliable performance and long-term user satisfaction.

10. Frequently Asked Questions (FAQ)

Q1: How long can it maintain temperature?

Hot beverages: 5–9 hours

Cold beverages: 7–12 hours

Q2: Does the slip lid compromise insulation?

No, when properly sealed, the vacuum layer governs thermal retention.

Q3: Is it dishwasher safe?

Hand washing is recommended to preserve coating and gasket life; some components may be dishwasher-compatible.

Q4: Can it be branded for corporate gifts?

Yes, powder-coated finishes and metallic surfaces allow for custom logos and colors.