A bottle is not only for water. At Yujie Cup, our double-wall vacuum build also keeps soup and meals hot for hours — a natural extension for catering, meal-prep, and outdoor B2B programs. This guide covers insulated food jars and how to specify them.
Table of Contents
1. Where Food Jars Fit
Food jars serve buyers who need hot meals on the move: catering kits, corporate meal programs, and outdoor retail. Yujie Cup applies the same vacuum know-how from our vacuum insulation guide to a wider-mouth jar built for soup and grains.
| Use | Suggested Size |
|---|---|
| Catering kit | 500 ml wide mouth |
| Meal prep | 350 ml compact |
| Outdoor retail | 750 ml wide mouth |
| Care package | 350 ml branded |
A wide-mouth vacuum jar keeps soup hot and is easy to fill and clean.
2. Build & Heat Retention
The seal and vacuum gap decide how long food stays safe to eat. Yujie Cup rates retention per our temperature retention guide and seals each jar to the standard in our sealing technology article so it does not leak in transit.
| Feature | Effect |
|---|---|
| Double-wall vacuum | Hours of heat hold |
| Wide mouth | Easy fill & clean |
| Silicone seal | Leak-free transport |
| 18/8 steel | No taste transfer |
3. Size & Branding
Pick size by portion: 350 ml for a side, 500–750 ml for a full meal. Yujie Cup brands jars with laser or print and sets MOQ in our MOQ & lead time guide so a food program launches on time.
Match jar size to the portion so the program is practical, not promotional only.
Specify your food jar
Tell Yujie Cup your use, size, and volume; we return a vacuum jar plan with seal spec, branding, and lead time.
Frequently Asked Questions
Are food jars just big bottles?
No — a food jar has a wider mouth for filling and cleaning, and is rated for hot solids, not just liquid. We build it on the same vacuum principle but tune it for meals.
How long do they keep food hot?
Retention depends on size and fill; our temperature retention guide lists typical hours. A full, pre-warmed jar holds heat longer than a half-filled cold one.
Do they leak in transit?
No, when sealed correctly. Each jar uses the same silicone-seal standard as our bottles, verified per batch so soup stays inside during delivery or a commute.
Can food jars be branded?
Yes. Laser or print carries your brand, and our MOQ & lead time guide covers tiers so a catering or retail program stays on schedule.