Whoa - are those tubes?
Stopped me in my tracks, this glass did! Alas - they are NOT tubes, but boy, do they look like it!
What they are is apparently 254 EDP over a core of ... ? Clear? Light pink? The idea being that they will come out striped and streaky when you wind off a bead - much like Raven Sky or Ebony and Ivory, recent fabulous Effetre colours.
But the effect is rather subtle - given that EDP can be somewhat variable - these aren't much more exciting than just using EDP by itself - although, with a core of something not EDP, it should be cheaper than EDP alone.