These glass jars are quite useful for so many uses.  Personally, I have transferred all the different spices from their original containers into these and added uniform labels.  I also have them in my craft room, holding beads, stickers, etc.  The sticker on the bottom indicates they can be used to create candles.  They have a plastic ring seal which holds the lid on securely, and the shape of the knob on the lid makes them easy to pull off.  They hold about 4 oz liquid.