Capacity: 350ml/20oz

Size/weight: 4.8×7.2×15.7cm/300g

Carton: 54×36×21.7cm/0.042m³

QTY: 24pcs

N.W./G.W.: 7.2/8.7kgs

1. Introduction: The Growing Demand for Compact Yet Efficient Hydration Solutions

The market for sports and outdoor water Bottles increasingly demands compact, high-performance solutions suitable for a variety of scenarios. A 350ml large-mouth insulated stainless steel sports and outdoor water bottle provides a balance between portability and effective thermal retention. Its relatively small capacity ensures easy handling during high-intensity activities or daily commuting while still maintaining the thermal and mechanical performance expected in professional-grade bottles.

This water bottle combines a stainless steel body with a black flip-top lid featuring a carry loop and silver trim. Double-wall insulation ensures consistent temperature retention, while the leak-proof design and portable form factor provide versatility for gym sessions, office commutes, or outdoor activities.

2. Core Concepts and Key Technologies

2.1 Double-Wall Vacuum Insulation

The foundation of thermal performance lies in double-wall vacuum insulation. Two concentric stainless steel walls create a vacuum layer that dramatically reduces heat transfer via conduction and convection. This ensures beverages remain hot or cold for extended periods despite environmental variations.

For a 350ml bottle, thermal management requires attention to:

Wall thickness: Optimal thickness balances insulation and portability.

Vacuum uniformity: Even distribution prevents localized heat loss.

Lid performance: Effective sealing complements the thermal properties of the body.

Precision engineering ensures that even smaller bottles provide comparable thermal performance to larger units, critical for professional or wholesale applications.

2.2 Flip-Top Lid Design and Leak-Proof Technology

The black flip-top lid combines convenience and reliability:

Leak-proof sealing: High-quality silicone gaskets prevent liquid escape under pressure or motion.

Rapid access: One-handed operation facilitates hydration during physical activities.

Portability: Integrated carry loops enhance transport options without compromising ergonomic comfort.

Silver trim components reinforce high-stress points around the lid, providing long-term durability even under frequent opening cycles.

2.3 Ergonomics and Usability

The compact 350ml design emphasizes ergonomics:

Grip optimization: Narrow body profile with textured surfaces minimizes slip risk.

Mouth diameter: Large opening allows easy filling, pouring, and cleaning.

Weight distribution: Lightweight construction reduces hand fatigue during extended use.

These considerations are critical for B2B buyers supplying gyms, outdoor retailers, or corporate wellness programs.

3. Product Structure, Materials, and Manufacturing Processes

3.1 Material Selection

Food-grade stainless steel is the material of choice due to:

Corrosion resistance: Maintains integrity during exposure to water, sweat, and beverages.

Mechanical strength: Supports impact resistance for active usage scenarios.

Chemical inertness: Prevents flavor contamination and ensures beverage safety.

Commonly used alloys include 304 stainless steel, while 316 is selected for applications with higher exposure to humidity or chloride environments.

3.2 Forming Techniques

The bottle body is manufactured via:

Deep drawing: Produces seamless cylindrical structures, reducing stress points.

Hydroforming: Ensures uniform wall thickness and supports ergonomic designs.

Seamless construction enhances vacuum retention and provides mechanical resilience, crucial for compact bottles subjected to frequent handling.

3.3 Welding and Vacuum Creation

Precision laser welding joins the inner and outer shells, minimizing heat-affected zones that could compromise thermal efficiency. Vacuum creation is performed under controlled conditions, with quality checks including:

Pressure decay testing: Detects potential micro-leaks.

Thermal retention verification: Simulates real-world usage including repeated lid operations and temperature fluctuations.

These steps ensure consistent performance across units, a key consideration for bulk procurement.

3.4 Surface Treatment and Trim Integration

Exterior finishes include brushed stainless steel or powder coating:

Brushed surfaces: Facilitate cleaning and maintain aesthetic appeal.

Powder coating: Provides scratch resistance and improves grip.

Silver trim reinforces high-stress areas near the lid and carry loop interface, ensuring durability while maintaining a minimalist design.

4. Key Factors Affecting Quality and Performance

4.1 Thermal Retention

Factors affecting thermal efficiency include:

Vacuum quality and uniformity

Wall thickness consistency

Lid gasket compression

Repeated mechanical stress

Even in smaller bottles, deviations in these factors can lead to reduced temperature retention, impacting user satisfaction in B2B applications.

4.2 Leak-Proof Reliability

Leak-proof functionality depends on:

Silicone gasket precision

Lid threading tolerances

Flip-top hinge strength

Reliable sealing is essential for commuting, gym, or outdoor scenarios where bag spills must be avoided.

4.3 Mechanical Durability

Durability is influenced by:

Stainless steel alloy choice

Seamless construction

Reinforced lid and carry loop interface

Rounded edges to reduce stress concentration

A 350ml bottle is lightweight but still requires engineering to withstand frequent handling and accidental drops.

4.4 Batch Consistency

For wholesale or corporate procurement, maintaining uniform performance across hundreds or thousands of units is critical. Process control, in-line inspection, and batch traceability are essential to ensure consistent thermal and leak-proof performance.

5. Supply Chain and Supplier Evaluation

When sourcing compact insulated bottles, B2B buyers should evaluate:

Material certification: All stainless steel and food-contact components must meet regulatory standards.

Process reliability: Laser welding, vacuum formation, and surface finishing must follow strict quality protocols.

Component standardization: Lids, gaskets, and trim pieces must be uniform across production batches.

Customization flexibility: Options for branding, color, or ergonomic adjustments should not compromise performance.

Logistical reliability: Secure packaging, timely delivery, and traceable batches reduce operational risk.

Supplier assessment ensures product consistency and reliability for bulk buyers in fitness, outdoor, or corporate wellness sectors.

6. Application Scenarios and Industry Use Cases

6.1 Outdoor Activities

Compact bottles are ideal for hiking, cycling, and day trips. Large mouth openings facilitate easy filling and cleaning, while the carry loop allows attachment to backpacks or belts.

6.2 Gym and Fitness

One-handed flip-top access supports rapid hydration during workouts. The small, lightweight design ensures minimal disruption, while durable materials withstand repeated handling and cleaning.

6.3 Commuting and Office Use

The compact 350ml bottle fits easily in bags or cup holders. Leak-proof design prevents spills, and minimalist aesthetics ensure professional suitability.

6.4 Wholesale and Corporate Gifting

These bottles are frequently sourced as branded giveaways, wellness incentives, or bulk retail products. Customization of lids, colors, or surface finishes enhances marketability while maintaining performance standards.

7. Frequently Asked Questions (FAQ)

Q1: How long can a 350ml bottle maintain beverage temperature?

Double-wall vacuum insulation ensures several hours of hot or cold retention under normal conditions.

Q2: Are flip-top lids safe for hot liquids?

Yes. Silicone gaskets and venting prevent leaks and manage thermal expansion.

Q3: Is the bottle durable for repeated use?

High-quality stainless steel, reinforced lid interfaces, and seamless construction provide reliable durability.

Q4: Can the bottles be customized for branding or corporate purposes?

Yes. Surface finish, lid type, and minor ergonomic adjustments can be applied without affecting performance.

Q5: Are they suitable for outdoor and gym use?

Yes. Compact design, leak-proof lids, and thermal retention make them suitable for multiple environments.

8. Current Trends and Future Development

Key trends include:

Improved lid engineering: Faster access without compromising leak-proof integrity

Sustainable materials: Recyclable stainless steel, eco-friendly coatings

Modular components: Replaceable lids or gaskets for extended lifecycle

Performance validation: Transparent testing for thermal retention and leak-proof performance

Smart hydration integration: Emerging IoT-enabled hydration tracking for fitness and outdoor applications

Future developments focus on ergonomic optimization, verified thermal and mechanical performance, and enhanced modularity for long-term use in B2B contexts.

9. Conclusion

The 350ml large-mouth insulated stainless steel sports and outdoor water bottle represents a compact yet high-performance hydration solution. Double-wall vacuum insulation, flip-top leak-proof lids, and portable design provide reliable hydration in gym, commuting, and outdoor scenarios.

For B2B buyers, key factors include thermal retention, mechanical durability, leak-proof reliability, and supplier competence. The 350ml size offers ease of handling, portability, and ergonomic comfort while maintaining performance standards, making it an ideal choice for wholesale, corporate gifting, or retail applications.