Hi, two dimensional images certainly have their shortcomings.
Anyway here are some random observations which might help to flesh out my original description

The glass has been thinly blown ( like Ben's piece it's quite delicate) - if tapped it emits a tinny note.
There are a few seeds and the odd elongated bubble in the area just below the rim. There's also an elongated open bubble on the inside surface.
There are a number of striations in the glass - presumably what you'd expect in something that's been hand blown.
I don't think it's opalescent.
I think the white has probably been picked up on the marver.
Where the white ( which has a feathery look

) has been applied the surface of the glass is slightly rough - hardly discernible.
The pink looks very like the pink found on IOWSG Pink & blue swirls ( I'm not suggesting any connection- just an observation re the colour ! )
The decoration has definitely been applied to the surface - it hasn't been cased.
If you run your finger over the surface you can feel that it's raised.
The inside is perfectly smooth.
Hope this might help

Scott