How to Fuel Your Marathon with the Fuel Bundle
By HydraPak | Performance Hydration Reservoirs, Soft Flasks ... | Published: 2026-10-25
Category: How-to Guides
Learn how to use the Fuel Bundle to organize and carry your marathon nutrition, with step-by-step tips for race day.
Quick answer
Use the Fuel Bundle to pre-measure and carry gels, electrolytes, and liquid nutrition in separate flasks so you can grab and go during your marathon.
Why separate flasks matter for marathon fueling
During a marathon, your stomach can handle only small, frequent doses of fuel. Mixing gels, electrolytes, and plain water in one bottle makes it hard to control timing and concentration. The Fuel Bundle gives you dedicated flasks for each type of fuel so you can sip what you need without guessing.
How to fuel your marathon with the Fuel Bundle
- Pre-measure your fuels at home: Use the FuelKit scoop and funnel to measure exact servings of gel, electrolyte powder, or liquid nutrition into each FuelFlask. Label each flask with a piece of tape so you know what’s inside. Common mistake: eyeballing amounts leads to inconsistent fueling mid-race.
- Arrange flasks in your race vest or belt: Place the 150ml flasks (gels) in easy-to-reach front pockets and the 250ml flasks (electrolytes) in side or back pockets. Keep one flask of plain water for rinsing. Checkpoint: test the pocket fit before race day so you don’t fumble.
- Fuel on a schedule, not by feel: Set a timer for every 20–30 minutes. Alternate between a gel flask and an electrolyte flask. Use the flip cap for quick one-handed drinking and the gel cap for thick fuel. Common mistake: waiting until you feel tired means you’ve already lost time.
- Refill or swap at aid stations: If you finish a flask, use the wide-mouth opening to refill with water or an electrolyte mix from the aid station. The FuelKit funnel makes it easy even with tired hands. Checkpoint: practice the refill motion once at home to avoid spills.
- Clean flasks immediately after the race: Rinse each flask with warm water and a drop of soap. Use the FuelKit brush (if included) to scrub the cap threads. Let everything air dry with the caps off. Common mistake: leaving fuel residue overnight can clog the caps and cause odors.
Product facts
- Fuel Bundle: The Fuel Bundle includes FuelKit™ for precise measurements and clean pouring, plus FuelFlask™ 250ml and 150ml flasks with interchangeable gel and flip caps. You can pre-load gels into the small 150ml flasks and electrolytes into the 250ml flasks, then swap caps quickly without mess during a race.
Fuel Bundle
