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The travel mug, model RD-CGN045N1.E, has been marketed by Vietnam's Rang Dong with a stainless steel liner to retain the drinks temperature for extended periods.

The stainless steel vacuum flask made by Vietnam’s Rang Dong offers perfect insulation, retaining the drinks temperature far longer than ordinary water bottles.

The stainless steel vacuum flask made by Vietnam’s Rang Dong offers perfect insulation, retaining the drinks temperature far longer than ordinary water bottles.

The high-quality handheld water bottle made by Vietnam’s Rang Dong with advanced thermal insulation and durable materials helps ensure sufficient daily hydration.

Designed vacuum flasks are among the best gifts for students at their school year end as the item combines daily convenience with a lasting brand impression.

Silver coating helps vacuum flasks reduce radiant heat transfer, maintain drink temperature longer, and improve daily hot and cold beverage performance.

A new vacuum flask should be cleaned, checked, and used correctly from the first day to support better hygiene, insulation performance and long-term durability.

How often to clean a reusable water bottle is a simple question but for user's health and product durability it matters a lot.