THERMOS FUNTAINER Kids Food Jar with Spoon
- Lunch Box
- Stainless Steel
- Push Button Lid
- 1
- Better rated than 74%
- More reviewed than 89%
A well-reviewed, kid-sized food jar that reliably holds a lunch period's worth of heat, best treated as a school-lunch tool rather than an all-day thermos.
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How it ranks among the 19 lunch boxes we track
4.7★ across 48,600 Amazon ratings, Bayesian-smoothed toward the category average.
48,600 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
1,000+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 19 lunch boxes we track - how the scorecard works · full lunch boxes data report. Confidence: high - strong rating volume and complete data.Updated 6 days ago. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
A 10-ounce Thermos FUNTAINER stainless steel food jar in a Mario Kart print, with a push-button lid and a foldable spoon built into the lid. Double-wall vacuum insulation is rated to keep contents hot up to 5 hours or cold up to 7 hours.
This is sized and priced as a school lunch item rather than an all-day thermos, and reviewers are specific about that distinction: several report solid heat retention through a school-day lunch period but pushed back on any claim of holding heat for 8 or 24 hours. Preheating or precooling the jar before filling it is the detail reviewers most often credit for better results.
- 10 oz double-wall vacuum insulated
- Keeps food hot up to 5 hours, cold up to 7
- Push-button lid, integrated folding spoon
- 18/8 stainless steel, BPA free
Who it's for
Fits parents packing a single hot or cold item for a school lunch, with the built-in spoon aimed squarely at younger kids who need one utensil that cannot get left behind. Anyone wanting a jar to hold food hot for a full day or overnight shift should size up to a larger, longer-rated container.
What buyers say
From Amazon customer reviews.
Reviewers consistently report the jar holding lunch-appropriate heat for a typical school morning to midday stretch, with several noting it lasted years of daily use without damage. The main pushback is on marketing language implying 8 or 24 hour retention, which multiple reviewers say does not hold up, and one noted a young child needed help with the lid.
Strengths and trade-offs
Drawn from this product's published specifications.
- Push-button lid with integrated folding spoon
- Reliable heat retention through a school lunch period
- Durable enough to last multiple school years per reviewers
- Not rated for all-day 8-plus hour heat retention
- Younger kids may need help opening the lid
- Best results require preheating or precooling before filling
Specifications
| Brand | Thermos |
|---|---|
| Dimensions & fit | |
| Item Weight | 9.9 ounces |
| Item Dimensions L x W x H | 3.5 × 3.5 × 5.3 inches |
| Item Dimensions D x W x H | 3.5 × 3.5 × 5.3 inches |
| Capacity & performance | |
| Age Range Description | Kid |
| Construction & materials | |
| Material Type | Stainless Steel |
| Color | Mario Kart |
| Included components | |
| Unit Count | 1 |
| Included Components | Insulated Food Jar |
| Other details | |
| Closure Type | Push Button Lid |
| Number of Compartments | 1 |
| Number of Items | 1 |
| Shape | Round |
| Style Name | Food Jar |
| Item Form | Canister |
| Item Type Name | Insulated Food Jar |
| Recommended Uses For Product | School |
| Additional Features | Dishwasher Safe, Durable, Lightweight |
| Pattern | Cartoon |
| Product Care Instructions | Dishwasher Safe |
| Theme | Cartoon |
How it compares
This product against the closest alternatives we track in lunch boxes.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| THERMOS FUNTAINER Kids Food Jar with SpoonThis product | 4.7 / 5 | 48,600 | 4.7 / 5 |
| Crock-Pot Electric Lunch BoxCrock-Pot | 4.6 / 5 | 10,200 | 4.8 / 5 |
| PackIt Freezable Snack BoxPackIt | 4.8 / 5 | 12,700 | 4.7 / 5 |
| Bentgo Chill Kids 4-Compartment Bento Box Leakproof Lunch BoxBentgo | 4.6 / 5 | 19,100 | 4.6 / 5 |
| Omie OmieBox Kids Insulated Leakproof Bento Lunch Box with Food JarOmie | 4.5 / 5 | 42,100 | 4.5 / 5 |
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Questions about the Thermos lunch boxes
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
How long does the THERMOS FUNTAINER keep food warm?
The manufacturer rates it up to 5 hours hot, and reviewers commonly report it holding warmth through a typical school lunch period of 4 to 5 hours.
Does it come with a utensil?
Yes, a foldable spoon is built into the lid so a utensil is always included.
Is it dishwasher safe?
It is listed as dishwasher safe, though hand washing is recommended by the manufacturer.