How to Choose a Safe Thermos: 6 Key Steps

1. Buy from Reputable Brands

2. Check Material Labels

3. Smell & Touch Test

4. Inspect Accessories

5. Test Heat Retention

6.Check for Leaks
 

1. Buy from Reputable Brands
   - Avoid unknown sellers on sketchy websites  
   - Check for certifications (FDA, LFGB, or local food safety standards)  

2. Check Material Labels 
   - Look for "SUS304" or "316" stamped on the bottom or inner wall  
   - Avoid vague terms like "high-quality stainless steel"  

3. Smell & Touch Test
   - A good thermos should have no strong odor 
   - Inner surface should be smooth, not rough

4. Inspect Accessories
   - Lids and seals should be food-grade silicone (not cheap plastic)  

5. Test Heat Retention
   - Fill with hot water, close the lid, wait 2-3 minutes  
   - If the outer wall gets warm quickly, the vacuum insulation is poor  

6. Check for Leaks
   - Fill with water, close tightly, shake, and turn upside down  
   - No leaks = good seal  

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