The Protein Rebel Soft Flask is a 500ml collapsible bottle for runners who carry their own drink. Wide 4cm neck for pouring in a stick of electrolyte powder, silicone bite valve for drinking on the move, and at 42g it folds flat in a vest pocket once it's empty.
One Stick, One Flask: The 4cm opening takes our electrolyte powder stick straight in, no funnel, no mess. Fill to the 500ml line and shake — a stick mixed exactly as the pack directs, in the vest before you're out the door.
Built For The Vest: Soft TPU, 26cm tall and 6.5cm wide, fits most running-vest front pockets and collapses as you drink so nothing sloshes. High-flow bite valve with a leak-proof cap, so it rides upside down in a pack without a problem. Tested on long runs, not just in the office.
High-Vis. Obviously: Rebel Orange so you can find it in the bottom of the bag or on the aid-station table. BPA-free, made from recycled TPU, and built for a season of long runs, not one race.
