Gumballs

From the Gumdrops Begleri wordpress site:

Gumballs begleri are medium-sized Grade 5 Titanium round hollow beads, available in a 23g and 28g version. They are medium sized beads that feel substantial in the hand, without the big bubbly feel that a lot of round shaped beads have. The hollowness of the 23g version, gives them a light, fast and floaty feel during play, and it also creates a “clack” sound.

Gumballs are available in six color options, and you might see them listed in matching and non-matching sets of beads. They are custom anodized by The Totalartist.