Behind an apparently simple vacuum flask lies the deep integration of material science, precision manufacturing and rigorous quality control. Wotai Technology keeps refining core craftsmanship for vacuum flasks, and empowers quality drinkware with precision processing.

Material Science & Inner‑liner Craftsmanship

Material selection has a direct bearing on drinking‑water safety. Wotai specializes in processing food‑grade 304 and higher‑performance 316 stainless steel to guarantee excellent corrosion resistance and stability of inner liners. For liner forming, deep‑drawing stamping is adopted to realize integral forming from sheet metal, reducing weld seams and enhancing overall structural strength.

Core Heat‑preservation Technology: Realization of Vacuum Layer

The soul of a vacuum flask resides in the high‑vacuum thermal‑insulation layer sandwiched between double‑layer stainless‑steel structures. Wotai applies advanced laser welding technology to precisely seal the inner liner and outer shell at the cup rim, preparing conditions for vacuum pumping. Compared with conventional processes, its proven vacuum technology delivers higher vacuum level and longer‑lasting heat retention performance.

Precision Forming & Hydro‑forming Technology

Traditional processes have limitations when producing special‑shaped or complex cup bodies. Wotai’s hydro‑forming machines press stainless‑steel tubes against molds via hydraulic pressure. The technology enables diversified cup profiles, effectively relieves internal material stress, improves dimensional accuracy and product consistency, and greatly boosts production efficiency and yield rate.

Reliable Connection & Sealing Performance

Cup‑body sealing directly determines product service life. Wotai extensively applies laser welding, which features narrow heat‑affected zone, fine‑looking weld seams and high mechanical strength, so as to fully secure the sealing performance of drinkware products.