SZM Stainless Steel Lining Design Water Bottles, also known as vacuum flasks or insulated tumblers, designed to keep beverages hot or cold.
Here's some information for shopping:
Features:
These bottles typically feature double-walled vacuum insulation for temperature retention, keeping drinks hot for hours (e.g., 6 hours) or cold for longer durations (e.g., 8 hours).
Material:
They are commonly made from high-quality 304-grade stainless steel, which is rust-free, durable, and considered safe for drinking as it does not leach chemicals into the water.