Gerald Day's posable glasses at [Fast3D](http://fast3d.actionbabecentral.com/) could be used for your milk glass - just recolour the contents, and reduce the transparency. They're on the Archive 3 page. Trekkie has a milk carton on her site, in the morphing props section (it crumples). If you need a bottle, then I assume just any bottle won't do - and the shape of milk bottles is very regionalised. If you can supply a reference picture, I'm sure someone can knock something up. I have a [morphing sandwich](http://www.morphography.uk.vu/dl.php?file=sandwich.zip), if that will do; if not, hopefully I can find the precision scanned bread texture for you. It may have gone mouldy, though. This is an old prop. ;)