Flameworked mini vessel made in my home studio, is a place to keep anything you treasure, not just memorial ashes. From sand from that memorable vacation to pollen from your favorite flowering plant, from perfume to aromatherapy, and of course memorial ashes or your pets fur. All my vessels are hand formed, making them truly a one-of-a-kind vessel. Interior is not hollow, rather it's a long 3/16" diameter tube. Once you've placed your treasure inside, insert the cork and press to permanently seal in contents. If you're using them for something like aromatherapy, place the cork in lightly so it can be removed. All my glass items are hand made (by me) in my home studio, using the ancient Venetian style of bead making known as lampwork, where glass is melted in a flame and formed into beads.