All you need are your regular safety pins — you know, those things they hand out at every race for attaching your bib to your shirt. Take a gel, put it inside your shorts on the left or right side, and flip the top over your waist band. Attach the top to your shorts using a safety pin and it won’t go anywhere during your race.

When you need it, just tuck it from your waistband – it’ll let go easily – but be aware that the pin might open, so don’t get stung. I found this works great and the gels don’t bounce up and down while running. I carry three gels at most, so I don’t know whether this works for more gels.