Dual-Layer Sealing System
Developed for the global business travel and outdoor travel market, this tumbler targets the core pain point of water cup leakage soiling documents and clothing when packed inside backpacks and suitcases. The lid is fitted with two layers of food-grade silicone gaskets. When fully tightened, they create a three-dimensional full seal that performs substantially better than single-gasket designs. The tumbler will not leak even when kept inverted for extended periods or jostled heavily inside luggage.
Threaded Lid & Vibration Resistance
Precision-engineered threads create a tight, secure fit that does not loosen from vibration over time. It stays sealed even when shifted around inside luggage during bumpy travel, with no risk of slow seepage that can stain contents. The screw-seal lid design is built for business travel and long-distance outdoor trips where secure packing is a top priority.
Precision Rim Polishing
The cup rim receives high-precision polishing for a perfectly smooth, even surface that sits flush against the gaskets with no gaps. This tight fit further improves sealing performance, and also makes the rim easier to clean with no crevices for dirt or bacteria to accumulate. A MARSCOAT easy-clean coating lines the interior, simplifying removal of coffee and tea residue while traveling.
Sourcing & Quality Verification
Dongke Electric Heating supports full OEM and ODM customization for body color, branding, capacity and lid details. Every unit passes a 4-hour inverted leak test and vacuum inspection before leaving the factory, with AQL standard sampling applied to finished batches. Third-party on-site pre-shipment inspection is accepted. Export-grade packaging includes sufficient internal cushioning for safe long-haul transport.
Product Specifications
|
Parameter |
Specification |
|
Inner Liner Material |
304 food-grade stainless steel |
|
Outer Shell Material |
201 stainless steel |
|
Insulation Duration |
6–12 hours |
|
Lid Type |
Screw seal lid |
|
Seal Structure |
Dual silicone gaskets |
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