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Xtusimple designs double-wall, vacuum-insulated stainless steel hydration bottles whose smart two-in-one lid switches from straw sip to open chug to match workouts and hikes. Inside the Fit Odyssey package, 42 playful achievement stickers turn refills into milestones, nudging steady progress toward bigger goals. Drop an Xtusimple bottle into your pack and let those stickers cheer as cold water fuels the climb.