Capacity: 1200ml

Size/weight: 10×7.7×25cm/500g

Carton: 62×59.5×29cm/0.107m³

QTY: 20pcs

N.W./G.W.: 10.0/12.0kgs

In modern urban environments, the need for a large-capacity, portable beverage container has steadily increased. A 1200ml insulated stainless steel Tumbler addresses this demand by combining volume with thermal efficiency, portability, and ergonomic handling. Its design, featuring a handle and flip lid, caters to daily commuters, office workers, and outdoor enthusiasts, offering convenience without compromising performance.

For procurement professionals, corporate buyers, and B2B distributors, understanding the engineering, materials, and manufacturing behind such a tumbler is essential to ensure durability, reliability, and compliance with international food safety standards.

Core Concepts: Thermal Management and Insulation Technology

Double-Wall Vacuum Insulation

The primary thermal technology in a 1200ml tumbler is double-wall vacuum insulation. Two concentric stainless steel walls enclose a vacuum layer, significantly reducing heat transfer through conduction and convection. Reflective or polished inner surfaces further minimize radiant heat loss, allowing hot beverages to maintain optimal drinking temperatures for hours while keeping cold beverages chilled without condensation on the exterior.

Large-capacity tumblers face additional thermal challenges due to increased surface area, making precision in vacuum creation and wall thickness more critical than in smaller models.

Lid and Seal Engineering

The flip lid plays a dual role: user convenience and thermal performance. High-quality lids incorporate food-grade silicone gaskets to ensure airtight sealing while allowing easy one-handed operation. Precision in molding and assembly is essential; even minor gaps can become significant points of heat loss or leakage, especially in high-volume containers.

Structural Design: Ergonomics and Stability

Handle Integration

Given the 1200ml volume, ergonomics and safety are critical. The integrated handle must support the weight of a full tumbler without compromising thermal isolation from the inner chamber. Structural analysis ensures stress distribution avoids fatigue cracking, particularly under repetitive lifting during daily commutes.

Handles are commonly attached via welding or mechanical bonding to the outer wall, preserving thermal integrity while providing sufficient mechanical strength for long-term use.

Body Geometry

The tumbler body is usually cylindrical or slightly tapered, balancing stability and portability. Its base is engineered to fit standard vehicle cup holders, while the smooth, ergonomic exterior ensures comfortable handling. Special attention is paid to the outer wall thickness and vacuum layer uniformity to maintain consistent thermal performance across the entire volume.

Flip Lid Mechanism

The flip lid addresses multiple operational requirements: spill prevention, thermal retention, and ease of access. Multi-component designs—combining rigid polymer frames with soft silicone gaskets—ensure durability and leak resistance. Hinge mechanisms are engineered to withstand thousands of cycles without misalignment, maintaining usability throughout the tumbler’s lifecycle.

Materials: Food Safety and Durability

Stainless Steel Selection

The core structure is typically 18/8 (304) stainless steel, valued for its:

High resistance to corrosion and oxidation

Mechanical strength under thermal cycling

Non-reactivity with acidic beverages

Neutral taste and odor retention

The inner wall is often electropolished to minimize micro-porosity, enhancing hygiene and facilitating cleaning. The outer wall may undergo bead blasting or powder coating for aesthetic consistency, scratch resistance, and improved tactile feel.

Lids, Handles, and Gaskets

Handles and flip lids are made from BPA-free, food-grade plastics and silicone. High-quality silicone gaskets maintain elasticity across temperature ranges from hot coffee to cold beverages, ensuring leak-proof performance. Materials are tested for chemical stability, thermal endurance, and durability to guarantee long-term reliability.

Manufacturing Processes: Precision and Quality Control

Producing a 1200ml insulated tumbler requires meticulous process control:

Deep drawing of stainless steel shells to achieve consistent wall thickness

Laser or TIG welding to seal the vacuum chamber

Vacuum evacuation and sealing validation to maintain thermal integrity

Surface finishing, including polishing, coating, and engraving for aesthetics and grip

Automated leak and pressure testing to ensure performance standards

Given the increased volume, dimensional precision is critical. Minor deviations in wall thickness, lid alignment, or handle bonding can significantly impact thermal retention, leak-proofing, and user safety.

Key Factors Affecting Quality and Performance

Several factors determine the reliability and effectiveness of a large-capacity tumbler:

Vacuum integrity: Micro-leaks significantly reduce insulation efficiency

Lid and gasket precision: Ensures leak-free performance

Material consistency: Stainless steel composition impacts corrosion resistance and durability

Surface treatment: Influences hygiene, user comfort, and scratch resistance

Handle strength and attachment: Critical for stability when fully filled

For B2B buyers, these engineering criteria are often more decisive than aesthetic considerations in product selection.

Supply Chain and Supplier Selection Considerations

Selecting a reliable supplier is essential for institutional procurement:

Compliance with FDA, LFGB, and EU food-contact regulations

Traceable stainless steel and polymer sourcing

Documented quality control processes

Proven experience with vacuum-insulated containers

Capability to provide batch-consistent products and performance testing reports

Suppliers offering certifications for materials, vacuum and pressure testing, and traceable production records are typically preferred by corporate buyers.

Industry Challenges and Pain Points

Even mature products face recurring challenges:

Seal degradation over time, leading to leaks

Handle loosening or detachment after repeated use

Inconsistent thermal performance across production batches

Condensation or sweating due to compromised vacuum integrity

Addressing these issues requires precise engineering, material selection, and strict quality control during manufacturing.

Application Scenarios and Use Cases

The 1200ml tumbler is suitable for a variety of professional and daily-use contexts:

Office settings: Provides stable placement, prevents spills, supports frequent hot beverage consumption

Commuting: Vehicle cup holder compatibility, portable, single-hand operation

Outdoor activities: Durable, high-volume hydration for long commutes, hiking, or travel

Corporate gifting or bulk procurement: Reusable alternative to disposable cups, aligning with sustainability goals

Field observations indicate that large-capacity, ergonomically designed tumblers reduce waste and increase satisfaction among office workers and commuters alike.

Market Trends and Future Directions

Current trends in the large-capacity insulated tumbler segment include:

Modular, replaceable lids to extend product lifespan

Eco-friendly materials and coatings to reduce environmental impact

Enhanced tactile finishes for durability and scratch resistance

Standardized thermal testing for transparency and performance validation

Sustainability and supply chain transparency are increasingly important for Western corporate and B2B buyers, driving manufacturers to provide detailed material and production data.

Frequently Asked Questions (FAQ)

Q1: Does increased volume affect thermal performance?

Thermal efficiency depends primarily on vacuum quality, wall thickness, and lid sealing. Properly engineered 1200ml tumblers maintain temperature effectively.

Q2: How long can the tumbler keep beverages hot or cold?

High-quality double-wall vacuum tumblers can preserve hot drinks for 8–10 hours and cold drinks for 10–12 hours under typical conditions.

Q3: Are flip lids leak-proof?

Leak resistance relies on precision-molded gaskets and correct assembly rather than lid type alone.

Q4: Is stainless steel safe for acidic or carbonated drinks?

Yes. Food-grade 304 stainless steel is chemically stable and prevents taste alteration.

Q5: How durable is the handle?

Mechanically bonded or welded handles withstand repeated use without deformation or detachment.

Conclusion

The 1200ml Insulated Stainless Steel Tumbler with handle and flip lid demonstrates the integration of engineering precision, material science, and ergonomic design in a high-capacity beverage container. It meets practical needs for daily commutes, office use, and outdoor activities, providing large-volume hydration while maintaining thermal performance, portability, and leak-proof reliability. Its value lies in careful material selection, rigorous manufacturing processes, and precise engineering, making it ideal for B2B procurement, corporate gifting, and professional daily use.