Pretty much, although true pop-ups are much more buoyant than beads (most of which float anyway just not very well, based on my experience), and are a slightly different shape than regular beads. See the link below.
https://www.veals.co.uk/cgi-bin/sh000002.pl?WD=pop&PN=Tronix-Lumi-Pop-Ups-4565.html#SID=76