The Glass Pack is three unique glass stubby slides, each with a totally different feel.  Includes a free Stubby Slide gig case!
 
This three pack includes:
 
1.  Hand-Cut Wine Bottleneck Stubby Slide
2.  Snake Oil "Clark Stanley" Bottle Slide (like Duane Allman's Coricidan bottle)
3.  The Traditional Brown Glass Bottle Stubby Slide
 
The Bottleneck Slide comes with a strip of self-adhesive felt so you can line the inside and size the slide perfectly to the top of your finger.  Also comes with Shane Speal's cigar box guitar tuning guide.