The 420ml YOUYUE/YOUYUN/YOUGE Portable Insulated Flask is a premium stainless steel flask designed for on-the-go hydration. Featuring a small lid that doubles as a cup, this portable insulated flask makes traveling, commuting, or outdoor adventures effortless.
Constructed with 304 stainless steel for the inner and outer walls and 316 stainless steel for the bottom, this travel thermos ensures strong insulation. Hot water stays warm for over 8 hours, while cold beverages remain refreshing. The thick, heat-resistant handle allows safe one-handed pouring without slipping.
The ergonomic handle is easy to grip, while the wide-mouth opening makes filling, pouring, and cleaning hassle-free. With multiple capacity options and reliable after-sales support, this stainless steel flask ensures a comfortable user experience.

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