The 24oz Alta Water Bottle from Thermos® is a 18/8 BPA-free stainless steel vacuum insulated bottle designed for active lifestyles and everyday hydration. Keeps drinks cold for up to 18 hours. Durable construction built for daily use. BPA-free throughout.

Specifications: 24oz capacity | 18/8 BPA-free stainless steel | BPA-free | Keeps cold 18 hours

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Double-wall vacuum insulation keeps drinks cold 18 hours by eliminating heat transfer between the environment and your drink. Two walls of 18/8 stainless steel with the air removed between them means no medium for heat to conduct through — your drink stays at temperature whether the bottle is sitting in a hot car, on a sunny trail, or on a desk all afternoon. Sweat-proof exterior stays completely dry.

For best performance: pre-chill with cold water for a few minutes before filling, fill as close to the top as possible to minimize air space, and keep the lid sealed until you drink. Genuine Thermos® replacement lids and parts available at thermos.com/collections/accessories. Dishwasher safe — top rack only for lid components.

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Frequently asked questions

How long does the 24oz Alta Water Bottle keep drinks cold?
Up to 18 hours cold using double-wall vacuum insulation — no ice needed.

Is the lid leak-proof when closed?
Yes — the lid is engineered to be leak-proof when closed when fully closed, making it safe for bags and backpacks.

Is the 24oz Alta Water Bottle dishwasher safe?
Dishwasher safe — top rack only.