40oz Leakproof Insulated Stainless Steel Tumbler with Handle

• Q: What is the capacity of the tumbler and what are its exact dimensions?
  A: The tumbler holds 40 ounces (approximately 1.18 liters). Its height is typically 10-11 inches, and the base diameter is about 3.5 inches. The tapered design helps it fit most standard car cup holders.
• Q: How effective is the vacuum insulation? How long will it keep drinks hot or cold?
  A: The double-wall vacuum insulation significantly reduces temperature transfer. Hot beverages stay hot for 6-8 hours, and cold drinks remain cold for 12-16 hours. Ice retention can last up to 24 hours, depending on initial temperature and ambient conditions.
• Q: Is the lid truly leakproof? Can I safely put this tumbler in my bag?
  A: Yes, the lid is leakproof when the sliding mechanism is fully closed. It uses a silicone gasket to seal the drinking opening. The tumbler can be placed sideways in a bag without leaking, provided the lid is properly screwed on and the slider is closed.
• Q: Will the tumbler fit in my car's cup holder?
  A: Yes, the tumbler is designed to be cup holder friendly. Its tapered base and 3.5-inch bottom diameter fit most standard cup holders. However, some vehicles with unusually shaped or oversized holders may not accommodate it. We recommend measuring your cup holder if unsure.
• Q: What materials are used, and are they safe for hot beverages?
  A: The tumbler body is made of 18/8 stainless steel, which is food-grade, BPA-free, and rust-resistant. The lid is constructed from durable, BPA-free Tritan plastic with a silicone gasket. All materials are safe for beverages up to 212°F (100°C). Do not microwave or freeze the tumbler.
• Q: Can I customize this tumbler with my own logo or design?
  A: Yes, this product supports customization. You can add logos, text, or designs through printing or engraving. Minimum order quantities may apply depending on the method. Contact our sales team or select the customization option during checkout for details and pricing.
• Q: What is the warranty policy and how should I clean the tumbler?
  A: We offer a 1-year warranty against manufacturing defects. Hand washing is recommended to preserve insulation and finish. Use mild detergent and a soft sponge. Avoid abrasive cleaners and dishwashers, as high heat can damage the vacuum seal and exterior coating. The lid is top-rack dishwasher safe, but hand washing is preferred for longevity.
• Q: Is the straw included, and can I use it without the straw?
  A: Yes, a reusable straw is included with the tumbler. The lid has a straw slot; you can drink with the straw or remove the straw and sip directly through the opening. The sliding mechanism covers the opening when not in use to prevent spills.

Usage Instructions

• Fill with desired beverage. For maximum insulation, preheat or pre-chill the tumbler by adding hot or cold water for 1-2 minutes before filling.
• Secure the lid tightly by screwing it clockwise. Ensure the slider is closed for leakproof carrying.
• To drink, slide open the lid opening or use the included straw.

Precautions

• Hand wash only with mild detergent and soft sponge. Do not use abrasive cleaners or steel wool.
• Do not place in dishwasher, microwave, freezer, or oven.
• Avoid dropping or impact to prevent damage to vacuum seal.
• Do not overfill with carbonated beverages or boiling liquids without lid vented.
• Keep out of reach of children when containing hot liquids.