THERMOS Stainless King Vacuum Insulated Bottle 40 Oz
- 40 ounce stainless steel bottle
- Hot or cold for 24 hours, per the listing
- 18/8 stainless steel, screw cap
- 16 ounces empty weight
- 5 year limited warranty
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A large vacuum insulated bottle for family camping and road trips, with a cup that doubles as a lid. Cleaning guidance conflicts in the listing, so hand washing is the safe route.
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ASIN: B08JX32JHPCategory: Thermoses
Colors Available
Sizes Available
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Overview
A twist-and-pour stopper seals the opening of this double-wall bottle, and the serving cup screws on top as a lid. Vacuum insulation between the steel walls slows heat flow in both directions.
The reason to buy is capacity for several people without refilling. The limitation is care: the specs say hand wash only while the description says top-rack dishwasher safe.
Who it's for
Camps, road trips, job sites and cold-weather outings suit a large pour-and-share bottle. Commuters needing a narrow personal tumbler should pick a smaller model.
Pros and cons
- Large capacity for groups
- Cup doubles as lid
- Twist and pour stopper
- Exterior stays cool with hot drinks
- Care instructions conflict
- Heavy when full
- Wide base, tight for some holders
- Dimension spec in listing unreliable
Performance notes
A vacuum gap between two steel walls blocks conduction and convection, so the contents hold temperature for many hours. An open mouth is the main route for heat loss, so the cap matters as much as the walls.
Specifications
| Brand | Thermos |
|---|---|
| Dimensions & fit | |
| Base Diameter | 4.3 inches |
| Weight | 16 ounces |
| Capacity & performance | |
| Capacity | 40 ounces |
| Construction & materials | |
| Material Type | 18/8 stainless steel |
| Color | Midnight Blue |
| Included components | |
| Included Components | Beverage bottle |
| Warranty & support | |
| Manufacturer Warranty Description | 5 year limited |
| Other details | |
| Cap Type | Screw Cap |
| Product Care Instructions | Hand wash only |
Closest rivals on specs
Simple Modern Summit Insulated Water Bottle with Straw 22 Oz- Base Diameter 4.3 vs 2.9 inches (+48%)
- Item Weight 1 vs 0.81 pounds (+23%)
Simple Modern Disney Princess Kids Water Bottle 14 Oz- Base Diameter 4.3 vs 2.9 inches (+48%)
- Item Weight 1 vs 0.58 pounds (+72%)
YETI Rambler Bottle with Chug Cap 36 Oz- Base Diameter 4.3 vs 3.8 inches (+13%)
- Item Weight 1 vs 0.31 pounds (+223%)
Frequently asked questions
Will the Thermos Stainless King fit in a cup holder?
The base measures 4.3 inches across, which is wider than many cup holders. Check your holder before relying on it.
Can the Thermos Stainless King go in the dishwasher?
The specs say hand wash only, while the description says top rack dishwasher safe. Hand washing avoids the conflict.
Does the cup double as a lid?
Yes. The description says the serving cup works as a lid, and a twist and pour stopper seals the opening.