Travel Tumbler Hydro Flask HF-Kubek 40oz All Around Travel Tumbler Reef — 40 oz insulated stainless steel

Hydro Flask HF-Kubek 40oz All Around Travel Tumbler Reef is a 40-ounce insulated stainless steel travel tumbler designed to keep beverages at their intended temperature while you are on the move. The double-wall vacuum construction reduces heat transfer to maintain hot drinks hot and cold drinks cold for extended periods. The tumbler has an ergonomic shape for comfortable carrying and a spill-resistant lid to limit leakage during commuting, outdoor activities, or long journeys.

Advantages

The stainless steel body provides durability and resists odors or residual flavors, while the double-wall insulation improves thermal retention without condensation on the outer surface. The spill-resistant lid helps prevent accidental spills and supports one-handed drinking, and the 40 oz capacity reduces the need for frequent refills. The ergonomic profile and finish offer a secure grip and compatibility with many cup holders.

Suitable for

• Commuting and daily travel
• Hiking, camping, and outdoor recreation
• Long road trips and travel
• Office use for extended hydration or hot beverages
• Gym and post-workout hydration

Key specifications

• Capacity: 40 ounces (approx. 1.18 liters)
• Material: insulated stainless steel construction
• Insulation: double-wall vacuum insulation
• Lid: spill-resistant travel lid designed for one-handed use
• Exterior: ergonomic shape with non-condensing surface

How to use

Fill the tumbler with your beverage, close the spill-resistant lid securely, and carry the tumbler by hand or place it in a compatible cup holder. For hot liquids, allow a short moment after pouring to ensure the lid is properly seated before drinking. To open for drinking, use the lid mechanism as intended by the manufacturer and avoid squeezing or applying excessive force to the body and lid while full.

Usage recommendations

Hand washing the lid and body is recommended to preserve seals and finish; if dishwasher use is necessary, follow the manufacturer’s care instructions. Pre-warming with hot water for hot drinks or pre-cooling with cold water or ice for cold drinks helps maximize temperature retention. Do not use the tumbler for carbonated or alcoholic beverages under pressure and avoid microwaving.