400ml Stainless Steel Double Wall Vacuum Flask with Handle

Frequently Asked Questions

Q: What is the capacity and size of this vacuum flask?
A: This flask has a 400ml capacity, which is approximately 13.5 ounces. It is designed to be compact and portable, with dimensions roughly 7 inches tall and 2.8 inches in diameter, making it easy to fit in most cup holders and bags.

Q: How long does it keep drinks hot or cold?
A: Thanks to the double-wall vacuum insulation, this flask keeps hot drinks hot for up to 12 hours and cold drinks cold for up to 24 hours. Actual performance may vary based on external temperature and how often the bottle is opened.

Q: Is the flask made from food-grade stainless steel?
A: Yes, the flask is constructed from 18/8 food-grade stainless steel, which is BPA-free, rust-resistant, and safe for daily use. The interior does not retain flavors or odors from previous beverages.

Q: Can I customize the flask with my logo or design?
A: Absolutely. We offer custom printing and engraving options for bulk orders. You can add your logo, text, or artwork via screen printing, laser engraving, or full-color wrap. Minimum order quantities may apply, so please contact our sales team for details.

Q: Does the handle make it easy to carry? Is it removable?
A: The integrated handle is ergonomically designed for comfortable carrying and is securely attached to the bottle. It is not removable, but it does not interfere with storage or cleaning. The handle also allows you to clip the bottle to a bag or belt loop using a carabiner.

Q: How should I clean this vacuum flask?
A: We recommend hand washing with warm soapy water and a non-abrasive sponge. The wide mouth (approximately 2.5 inches) allows easy access for thorough cleaning. Avoid using bleach, chlorine, or abrasive cleaners. The flask is not dishwasher safe, as high heat may damage the vacuum seal.

Q: Is this flask leak-proof?
A: Yes, the flask features a leak-proof screw-on cap with a silicone sealing ring, preventing spills even when the bottle is turned upside down. Always ensure the cap is tightly closed before carrying in a bag.

Q: What is the warranty and return policy?
A: We offer a 1-year warranty against manufacturing defects, including vacuum seal failure and cap damage. For non-custom orders, returns are accepted within 30 days of delivery if the item is unused and in original packaging. Customized items are non-returnable unless there is a production error. Shipping costs for returns are the buyer's responsibility unless the item is defective.

Usage Instructions

• Before first use, wash the flask and cap with warm soapy water and rinse thoroughly.
• Fill with hot or cold beverage as desired. Do not overfill; leave some space for the cap.
• Close the cap tightly by screwing it on securely to ensure leak-proof performance.
• Carry the flask by the ergonomic handle or place it in a bag (cap facing up).
• To clean, hand wash only with a soft sponge and mild detergent. Rinse and dry immediately.
• Avoid using abrasive cleaners, bleach, or chlorine as they may damage the surface and insulation.

Precautions

• Do not microwave or place in freezer. Extreme temperatures may damage the vacuum seal.
• Do not put in dishwasher; high heat can compromise insulation and sealing.
• When filling with hot liquids, use caution to avoid burns. Keep out of reach of children.
• Do not store carbonated beverages, as pressure buildup may cause leakage or cap damage.
• Check the silicone sealing ring regularly for wear; replace if necessary to maintain leak-proof performance.

Available Options

Color: Custom Color (any color) and White. For custom colors, please contact our sales team for minimum order quantities and lead time.

Logo Customization: Screen printing, laser engraving, or full-color wrap available. Minimum order quantities apply.

Packaging: Custom packing options such as branded boxes, sleeves, or polybags are available upon request.