Salomon Soft Flask (500ml, 28mm opening) One flask. (2-piece set also sold separately) This was originally included with their hydration bags, but I have extras, so I'd like to offer it to someone who needs it. It's a new, unopened item with the high-flow valve seal still intact. [Shipping Method] It will be packaged in a plastic bag and shipped via Yu-Yu Mercari Mail Yu-Packet Post Mini. (Anonymous delivery, delivered to your mailbox) #TrailRunning #TrailRun #UltraMarathon #SoftFlask #HydraPak #HydrationBottle Capacity...500-999ml