Double Wall High Borosilicate Glass Cup - Heat Resistant Transparent Coffee Mug

PRODUCT HERO

Upgrade your drinkware line with our crystal-clear, hand-blown double wall high borosilicate glass cups. Featuring an ergonomic double-layer thermal design, these egg-shaped and handled mugs keep coffee, tea, and espresso at the ideal temperature while keeping the outer glass comfortable to touch.

• Material: 100% Food-Grade High Borosilicate Glass
• Temperature Resistance: -30°C to 150°C (Thermal Shock Resistant)
• Capacity Range: 80ml, 150ml, 250ml, 350ml, 450ml, 650ml
• Key Features: Anti-scalding thermal insulation, vented thick base, custom logo branding, eco-friendly

PRODUCT DETAILS

• Thermal Double-Wall Insulation: Two layers of borosilicate glass trap air to create a vacuum-like barrier, preventing scalding from hot drinks and condensation sweat on cold iced drinks.
• Craftsmanship & Vented Base: Masterfully hand-blown with high transparency. Features a safety vent hole at the bottom to balance atmospheric pressure between the glass walls.
• Accessories & Lids: Available with custom eco-friendly bamboo lids (featuring food-grade silicone sealing rings) or clear glass lids.
• OEM Custom Branding: Supports custom silk-screen, decaling, or laser printing of logos both inside and outside the glass surface.

QUICK SPECIFICATIONS

APPLICATIONS

Designed for versatile everyday use in homes, coffee shops, hotels, and office environments:

• Hot Coffee & Espresso: Ideal for Americano, Cappuccino, Latte, Macchiato, and Matcha.
• Tea & Herbal Infusions: Maintains brewing temperatures for loose-leaf tea, blooming tea, and herbal infusions.
• Iced Drinks & Desserts: Prevents melting condensation when serving iced coffee, smoothies, juices, cold milk, or desserts.

CUSTOM PET PREFORM DEVELOPMENT

Beyond premium borosilicate glassware, Rocsun Eco offers end-to-end OEM/ODM custom PET preform and container development to support global beverage and cosmetic packaging lines:

• Precision Mold Engineering: In-house tooling for specialized container shapes and custom neck finishes.
• Prototyping & Material Testing: Fast design turnaround with high-grade PET, RPET, and borosilicate glass options.
• Full-Scale Customization: Tailored bottle capacities, weight distributions, and surface decorations.

QUALITY CONTROL

Our strict quality management system guarantees safety and durability before shipment:

1. Raw Material Audit: 100% lead-free, non-toxic, eco-friendly raw borosilicate glass.
2. Thermal Shock Testing: Extreme temperature variation cycles from -30°C freezing to 150°C boiling water.
3. Pressure & Vent Integrity Check: Ensures the bottom air-vent hole is sealed properly to prevent moisture infiltration.
4. Visual & Ergonomic Inspection: Audited for crystal-clear optical transparency, uniform wall thickness, and defect-free edges.

PACKAGING & DELIVERY

• Individual Protection: Each glass cup is individually wrapped with protective bubble wrap or mesh sleeves, then placed in internal dividers/boxes to eliminate collision damage.
• Export-Grade Cartons: Packed into heavy-duty 5-ply corrugated master cartons and stacked on reinforced export pallets.
• Shipping Methods: Flexible worldwide delivery via Express Air (DHL/FedEx/UPS), Ocean Cargo (FCL/LCL), and Truck Freight.