Hydro Flask Insulated Stainless Steel Water Bottle, Dew 21 Ounces, Leakproof and Cupholder-Friendly

This Standard Mouth 21-ounce bottle is built for everyday carry and short outings: slim enough to fit most cupholders, rugged enough for daily bumps, and designed to preserve flavor without metallic aftertaste. Its double-wall vacuum insulation maintains temperature, while the stainless steel body and leakproof closure make it a reusable alternative to single-use bottles.

How does this bottle maintain cold or hot temperatures?

The Hydro Flask uses TempShield double-wall vacuum insulation to slow heat transfer between the bottle’s contents and the outside air. That insulation creates a thermal barrier so cold beverages stay chilled for up to 24 hours and warm drinks remain hot for as long as 12 hours under normal conditions.

• TempShield double-wall vacuum construction
• Stainless steel interior and exterior to reduce heat conduction
• Insulated cap to minimize temperature loss through the opening

Is the bottle leakproof and easy to carry?

The standard mouth screw cap closes securely to prevent leaks while transported in bags or holders. At 21 ounces and with a slim profile, it fits most vehicle and stroller cupholders and slips into backpacks without taking up much space.

• Leakproof when the cap is fully tightened
• Cupholder-compatible shape for on-the-go convenience
• Lightweight yet durable stainless-steel construction

How do I keep the bottle clean and tasting fresh?

The bottle resists flavor transfer so water tastes pure even after repeated use. It’s dishwasher-safe for easy cleaning; for more thorough care, hand-wash the cap and use a bottle brush to reach the bottom and sides.

• Pure taste with no lingering flavors between fills
• Dishwasher-safe body; hand-wash cap recommended for longevity
• Use a soft brush for the interior to avoid scratches

Are there any safety or usage notes I should know?

The bottle is built from durable, BPA-free stainless steel but isn’t designed for use in ovens, on stovetops, microwaves, or freezers. Keep very hot liquids away from children and avoid dropping the bottle on extreme surfaces to prevent dents that could affect the seal.

• Not safe for direct stove, microwave, or freezer use
• Keep hot liquids out of children’s reach
• Inspect seal and cap regularly to ensure leakproof performance

Who is this for: This Hydro Flask 21 oz Dew bottle suits commuters, gym-goers, parents, and anyone who wants a compact insulated bottle that balances portability and thermal performance. It’s ideal for short hikes, daily hydration, and travel when you need a reliable, taste-preserving bottle that fits cupholders and survives everyday wear.