High Quality Glass Room - The main component of the glass below is high-quality, harmless acrylic, so it is guaranteed that exposure to pepper or spices will not cause health problems. Advanced Leak-Proof - The cap and bottle body are mainly made of stainless steel, which seals perfectly, no need to worry about the chili or spice coming into contact with air or moisture. Easy to Refill - Just unscrew the grinder from the bottle to refill. Good Gifts - Perfect holiday gift choice.