Placing tags on items like teapots with knobs and handles is simple but when you have a vase with smooth sides labelling can be tricky. You can tape string from the inside of the vase but that isn't terribly attractive with a wide mouthed vessel. Here's my current way of tagging vases. Put a hole at each end of the label. Put the cord through the holes then thread beads through the cord. Put one bead into the vase and the tag will hang from the cord with the second bead acting as an attractive counterweight.