Hourglass

Decorative hourglass (sifting sand). H 150 mm × D 80 mm.I printed it from transparent PETG. The lids are glued with superglue.Height 150 mm, diameter approx. 80 mm. Wall thickness 0.4 mm, one perimeter.I attached sand grain size testers. I used bathing sand for chinchillas and found that the ideal hole size is 2.4 mm.Because the surface is not smooth, sand sticks to the walls.It serves as decoration 😉