Capacity: 630ml/21oz

Size/weight: 8.4×6.8×18.1cm/203g

Carton: 56×38×20.5cm/0.044m³

QTY: 24pcs

N.W./G.W.: 4.9/6.4kgs

The 21oz Insulated Stainless Steel Beer Cup for Car represents a significant advancement in mobile beverage solutions, merging thermal efficiency, durability, and convenience. Designed for hot or cold beverages, this polished stainless steel Tumbler features double-wall insulation to preserve beverage temperatures while driving, commuting, or traveling. Its 21oz capacity strikes a balance between generous volume and ease of handling, making it ideal for commercial fleet operators, office commuters, and outdoor enthusiasts.

In modern B2B and consumer markets, where portable, durable, and functional drinkware is increasingly demanded, this beer cup meets the criteria for practicality, aesthetics, and performance.

Core Concepts and Key Technologies

Double-Wall Insulation

The 21oz beer cup utilizes double-wall vacuum insulation, a technology essential for minimizing thermal exchange:

Vacuum Layer: The airless cavity between inner and outer walls significantly reduces heat conduction and convection.

Reflective Inner Surface: Polished stainless steel reflects thermal radiation, enhancing retention.

Optional Lid Integration: Spill-resistant lids limit thermal loss and prevent accidental spills in mobile environments.

Thermal retention benchmarks:

Cold beverages: Maintain chill for 5–7 hours

Hot beverages: Preserve warmth for 2–4 hours

This ensures beverages remain at optimal temperatures during commuting, long drives, or outdoor activities.

Ergonomics and Portability

For car use, ergonomics and cupholder compatibility are crucial:

Slim base fits standard vehicle cup holders.

Polished exterior offers comfortable grip and easy handling.

Optional lids with sliding openings enhance spill prevention while driving.

These design considerations improve safety and convenience for on-the-go consumption, differentiating this product in the competitive insulated drinkware market.

Product Structure, Materials, and Manufacturing

Structural Design

The 21oz beer cup comprises several critical elements:

Inner Liner: Food-grade stainless steel (SUS 304 or 316), resistant to corrosion and flavor transfer.

Outer Shell: Polished stainless steel for durability and visual appeal.

Vacuum Cavity: Ensures high-efficiency thermal insulation.

Base: Flat, stable, anti-slip to reduce tipping risk in vehicles.

Optional Lid: BPA-free silicone seal for leak prevention and thermal efficiency.

Material Selection

SUS 304/316 Stainless Steel: Provides long-term durability, corrosion resistance, and flavor neutrality.

Polished Exterior: Enhances aesthetics, cleaning ease, and tactile comfort.

BPA-Free Silicone Seals: Prevent leaks and ensure safety during transport.

High-quality materials are essential for regulatory compliance, product reliability, and consumer trust, particularly for B2B and automotive applications.

Manufacturing Process

Deep Drawing & Forming: Ensures uniform wall thickness and vacuum integrity.

Precision Welding: Seals vacuum cavity without compromising insulation.

Vacuum Evacuation: Creates the insulating layer critical for double-wall performance.

Polishing & Finishing: Provides smooth, durable surface with premium aesthetics.

Quality Assurance: Thermal tests, leak checks, and material certification ensure consistency.

This process guarantees high thermal efficiency, durability, and safety across large production volumes.

Performance Characteristics and Key Quality Factors

Thermal Retention

Cold beverages: 5–7 hours

Hot beverages: 2–4 hours

Performance depends on vacuum integrity, wall thickness, lid quality, and material grade.

Ergonomics and Usability

21oz capacity balances volume and portability.

Smooth, polished exterior ensures comfortable handling.

Lid options provide spill resistance and safe drinking in mobile settings.

Durability

Stainless steel resists dents, scratches, and corrosion.

Polished finish maintains visual appeal over prolonged use.

Lid and silicone seal sustain repeated cycling without performance loss.

For B2B clients, consistency across batches is vital to maintain trust in fleet or office deployments.

Factors Affecting Quality and Performance

Vacuum Seal Integrity: Leaks diminish thermal efficiency.

Wall Thickness & Material Grade: Influences durability and insulation.

Lid Design and Seal: Critical for thermal retention and spillage prevention.

Surface Finish: Smoothness supports hygiene and ergonomic handling.

Base Stability: Prevents tipping in automotive cup holders.

Suppliers must provide material certification, vacuum testing, and batch consistency reports to ensure quality.

Supply Chain and Vendor Selection

Supplier Evaluation

Critical considerations for sourcing 21oz beer cups:

Experience in insulated stainless steel drinkware production.

Capability for high-volume, consistent output.

Customization support for corporate branding or promotional campaigns.

Commitment to quality assurance and regulatory compliance.

Compliance and Certification

FDA/LFGB Certified Stainless Steel for food safety.

BPA-Free Lid Components to protect users.

REACH Compliance ensures chemical and environmental safety.

Customization and Bulk Orders

Laser engraving, embossing, or full-color printing available.

Custom packaging options for corporate gifting or marketing campaigns.

Eco-friendly production methods increasingly demanded by clients.

Common Questions (FAQ)

Q: How long does it maintain beverage temperature?

A: Cold beverages remain chilled 5–7 hours; hot beverages stay warm 2–4 hours.

Q: Is it safe for daily driving use?

A: Yes, with stainless steel construction and BPA-free lid seals.

Q: Will it fit standard car cup holders?

A: Yes, designed with slim base for compatibility.

Q: Can it be customized for branding?

A: Yes, laser engraving or full-color printing options are available.

Q: Is the lid leak-proof?

A: Reduces spillage significantly, though not fully leak-proof under extreme tilt.

Applications and Industry Use Cases

Fleet and delivery services: Keeps drinks warm/cold during commuting.

Corporate offices: Employee hydration with portable beverage solutions.

Outdoor activities: Camping, road trips, or sports events.

Promotional marketing: Custom branding for clients and employees.

Retail and e-commerce: Premium insulated drinkware for car travelers.

Its combination of thermal efficiency, portability, and aesthetic appeal ensures widespread utility across commercial, automotive, and personal sectors.

Current Trends and Future Directions

Enhanced Thermal Design

Spill-resistant lids and sliding openings are now standard.

Future models may include thermochromic indicators, anti-microbial coatings, and modular lid systems.

Portable and Automotive Compatibility

Growing demand for vehicle-compatible drinkware with optimal size and stability.

Compact bases and ergonomic exteriors enhance driving safety and convenience.

Market Outlook

Increased focus on premium, functional, and customizable drinkware in retail and corporate sectors.

Rising preference for eco-friendly materials and sustainable production.

Expansion in on-the-go beverage solutions, particularly for commuting and travel markets.

Conclusion

The 21oz Insulated Stainless Steel Beer Cup for Car merges advanced thermal performance, durable materials, and automotive-focused design. Suitable for hot and cold beverages, it is ideal for commuting, fleet operations, outdoor activities, and corporate gifting.

B2B buyers should prioritize material grade, vacuum integrity, lid design, and supplier reliability to ensure consistent quality and customer satisfaction. With portability, durability, and customization options, this beer cup meets modern demands for functional, aesthetic, and safe mobile drinkware.