Thickened 304 Material: The fermentation barrel is entirely made of stainless steel, with the barrel body, handles, inner lining, clasps, and barrel lid all made of food-grade 304 stainless steel. You can use it with confidence. With a barrel thickness of 0.5mm, it's sturdy, durable, and resistant to deformation. It's not prone to dirt accumulation, making cleaning effortless. Sealed for Freshness: The barrel lid features an embedded silicone sealing ring, providing double-layered sealing protection. The high elasticity clasp ensures a tight seal without gaps, preventing ants and insects from entering. It ensures no leakage even when inverted, and it won't spill during transportation or agitation. Sterile and Breathable: The top of the lid can be fitted with an exhaust pipe, which can be easily installed in seconds