1. Foldable,convenient and practical, save space for storage.    
2. Food grade silicone material makes it safe to storage food.    
3.The cap has a vent valve to avoid overheating and expansion, which is more secured.    
4. The cap is designed with leakproof silicone ring for better sealing.    
5. Color can be customized.   
The folding silicone box set is practical and convenient. The food grade silicone is very safe. The cap is made of PP material with buckles and leakproof silicone ring for better sealing.