• Capacity & Weight: Lightweight at approximately 200g with a 0.5L capacity, designed to be similar in weight to a smartphone.
  
• Superior Insulation: Achieves excellent heat retention (73℃ or higher for 6 hours) and cold retention (7℃ or lower for 6 hours).
  
• Advanced Insulation Technology: Features reduced heat transfer through a smaller contact area between the inner and outer bottles, as well as a copper coating on the inner wall of the vacuum section to prevent heat escape.
  
• Odor & Dirt Resistant Interior: The interior is electropolished, making it resistant to odors and dirt, suitable for aromatic beverages like coffee or flavored tea.
  
• Materials: Constructed from stainless steel (body), with polypropylene (lid, stopper), and silicone rubber (lid, stopper).
  
• Dimensions: Approximately W70mm × D70mm × H225mm (mouth diameter approx. 45mm).
  
• Care: Not suitable for microwave or dishwasher use.

The Rivers Vacuum Flask Stem STD is a highly portable and efficient stainless steel bottle, meticulously designed for both daily hydration and outdoor activities. Weighing in at only about 200g, it offers a 0.5L capacity while maintaining an ultra-light profile, comparable to a smartphone. Its advanced insulation technology, including a minimized contact area between bottle layers and a copper-coated vacuum interior, ensures superior temperature retention for both hot and cold beverages for up to 6 hours. The electropolished interior prevents the absorption of odors and dirt, making it an ideal choice for enjoying everything from water to aromatic coffees and teas.