304 Stainless Steel Vacuum Flask – 400ml Insulated Thermal Mug

Stay Hot or Cold All Day – 400ml Double-Wall Vacuum Flask

Meet your new everyday essential: a sleek, double-walled 304 stainless steel vacuum flask that keeps your drinks at exactly the temperature you love. Whether you're sipping a morning coffee on your commute, enjoying iced tea at the gym, or relaxing at home with a warm smoothie, this 400ml insulated mug is built to deliver.

Made in Mainland China.

Why You'll Love It

• Food-Grade 304 Stainless Steel + PP Liner – Thick, durable, and healthy. No unwanted flavours, no rust, no worries.
• Double-Wall Vacuum Insulation – Locks in heat or cold for hours, so your drink stays just the way you made it.
• Generous 400ml Capacity – The perfect size for a full coffee, tea, juice, or smoothie without constant refills.
• 100% Leak-Proof Seal – Toss it in your bag with confidence. No drips, no spills.
• Comfortable Handle – Ergonomic grip for easy carrying whether you're heading to the office, school, gym, or on a hike.
• Versatile Colours – Available in classic White, sophisticated Black, and warm Brown to match your style.
• Thoughtful Gift Idea – Packaged neatly and ready to delight a friend, colleague, or family member.

Specifications

Perfect For

• ☕ Hot coffee, tea, hot chocolate
• 🧃 Cold juice, iced tea, smoothies
• 🏋️ Gym, office, school, travel, home

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Please note: Photos may not reflect actual size — refer to the specifications above for accurate dimensions. Minor colour variations may occur due to monitor settings. Allow a slight tolerance for manual measurements.

Learn more: Nutrition.gov on cooking and food safety

Frequently Asked Questions

Q: What material is this vacuum flask made from?

A: This thermal mug features a food-grade 304 stainless steel inner liner combined with a durable PP (polypropylene) outer body. 304 stainless steel is widely regarded as a safe, rust-resistant material that won't impart flavours or odours to your drinks.

Q: How long does this insulated mug keep drinks hot or cold?

A: Thanks to its double-wall vacuum insulation design, this 400ml flask is engineered to maintain beverage temperatures for several hours — keeping hot drinks hot and cold drinks cold throughout your day.

Q: Is this 400ml thermal mug leak-proof?

A: Yes! This vacuum flask features a leak-proof seal, making it safe to carry in a bag or backpack without worrying about spills — ideal for commuting, gym sessions, or travel.

Q: How do I clean this stainless steel coffee mug?

A: We recommend hand-washing with warm soapy water and a bottle brush for best results. Avoid abrasive cleaners that could scratch the stainless steel surface. Do not submerge the lid mechanism for extended periods.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.