Blackburn, Pipeline HydraPak All Specialized Packs >>> Specialized Packs by Blackburn More details and ordering info. Blackburn's Pipeline HydraPak is geared toward the cyclist with its 70-oz design and soft GulpValve (TM) that lets you ride extra hours. User input on Pipeline HydraPak by Blackburn: Be the first to submit input on this product Submit Input: Your Name: Write or Paste Input here: Upload picture:      Review Guidelines