Capacity: 420mlSize/weight: 8.2×6.4×15cm/289gCarton: 49.2×50×17.8cm/0.044m³QTY: 20pcsN.W./G.W.: 5.78/7.78kgsIn mature beverageware markets across North America and Europe, product differentiation increasingly depends on engineering discipline rather than novelty. The 420ml modern insulated stainless steel tumbler represents a category that appears familiar, yet continues to evolve through material science, manufacturing refinement, and user-centered design.This capacity range aligns closely with daily hydration habits in office and commuting environments, where balance between portability and...