Lets have a look at Glass Jar Caps which is both airtight and rustproof. You may connect the lids to your cabinets, fill your jar with candies or snacks, and then reattach the jar to its lid for more inventive storage space in your kitchen. You should refrain from utilizing containers that expose your spices to moving air. Glass Jar Caps are now available in a few ranges like 63mm Lug Cap Mother Cap, BIg & Small Horlicks Caps, and Protein Cap. Since glass is non-porous, your spices will remain safe in them as long as the lid fits snugly.