These little brown bottles play BLAZING FAST LEADS on cigar box guitar.  They fit perfectly on the end of your slide finger and are short enough to weave in between strings.  Actual medical supply bottles that have been sourced for the perfect size and mass.
 
DIMENSIONS: 
Height: 2 Inches 51 mm 
Diameter: 1 1/4 Inches 31 mm 
Opening: 3/4 Inch 19 mm
 
Extras: Shane Speal's cigar box guitar tuning guide, burlap mojo bag and a 1.5" collectible pin.