Handheld bottles feature a rigid structure with an adjustable hand strap, offering instant access and easy refilling. Soft flasks are lightweight, collapsible designs that compress as you drink, eliminating water slosh and fitting easily into running vests or pockets.
For runs under 10K, 250-350ml is typically sufficient. Half-marathon training often requires 500ml, while marathon distances benefit from 600-750ml bottles or carrying two smaller bottles for balanced weight distribution.
Yes, most running bottles are designed for both water and sports drinks. Look for bottles with wide mouths for easy cleaning and BPA-free materials that won't retain flavours or odours between uses.
Choose bottles with adjustable hand straps that distribute weight across your palm rather than requiring a tight grip. The strap should feel snug but not restrictive, allowing your hand to relax naturally during your run.
Soft flasks excel on long runs because they compress as you drink, reducing weight and bounce. They also fit vest pockets perfectly, keeping your hands free. However, handhelds offer easier refilling at aid stations during races.
Soft flasks are specifically designed to fit vest chest and back pockets. Some slimline handheld bottles fit larger vest pockets, but check dimensions before purchasing. Most vests list compatible flask sizes in their specifications.
High-flow valves deliver more water per squeeze or sip, allowing you to hydrate quickly without slowing your pace. Leak-proof designs prevent spills in pockets or bags, keeping your gear dry during runs.