318 Series

Stainless Steel Inner Liner: Insulation Promise from Material Selection

The 318 Series uses food-grade stainless steel inner liners throughout, with excellent corrosion resistance and thermal reflection performance. The inner wall is finely ground to further improve smoothness, reducing beverage residue adhesion and making cleaning easy without odor transfer.

The double-layer vacuum structure is the physical basis for insulation performance. The air between the inner and outer walls is evacuated, cutting off heat conduction and convection paths. Whether it is freshly brewed hot coffee or cold brew tea with ice cubes, the temperature curve is gentle and stable.

"A good thermos does not keep water boiling forever, but lets you drink at the right temperature when you need it."

Temperature Evidence in Daily Scenes

Under laboratory standard conditions, after injecting 95°C hot water and sealing, the water temperature can still be maintained in a suitable drinking range after 6 hours. In actual use, whether on office desktops, commuting backpacks, or outdoor camping tables, the insulation performance remains solid. Hot tea filled in the morning still has warmth in the afternoon; ice water filled in summer will not be eroded by the ambient temperature all day.

The bottle cap and sealing components have also been repeatedly tested. The silicone sealing ring forms uniform pressure after tightening, no leakage when inverted, and can be placed with laptops and books in a bag without worry. The force required to open the bottle cap is moderate, ensuring sealing without making it difficult for people with less strength.

Design Considerations for Quiet Integration into Life

The bottle body diameter has been repeatedly refined to fit most car cup holders and backpack side pockets; the surface is coated with a matte coating, providing slight friction when held while retaining the solid feel of metal. The non-slip silicone pad embedded in the bottom makes a light and stable sound when placed on the desktop, without disturbing the quiet atmosphere in the library or meeting room.

The edge of the bottle mouth is rounded for comfortable direct drinking; the detachable tea strainer is also made of stainless steel, with fine holes that block tea leaves while not obstructing water flow. The overall structure has no complex dead corners, and daily maintenance costs are extremely low.

Let It Accompany You Longer

It is recommended to clean the inner wall with neutral detergent and a soft sponge after each use, avoiding steel balls or hard brushes. When not in use for a long time, wash and dry, then store with the bottle cap loosened to allow the sealing ring to rebound naturally and extend service life. The stainless steel inner liner will not age with time.

The matte coating on the shell is relatively wear-resistant, but small scratches are inevitable in daily use. These traces will accumulate over time, becoming a unique mark of this bottle, recording the journey it has taken with you.