Isotonic black filled icon

About the Isotonic black filled icon

A tall squeeze bottle with a pull-up nozzle cap, a collar below the lid and a grip waist narrowing at the middle carries a single lightning bolt on its face. The bolt signals fast energy and electrolyte replacement, while the bottle shape says hydration. Use it in fitness and running apps, gym menus, sports nutrition shops, supplement packaging and race-day checklists.

Body, waist and cap split the height into clear thirds, and the bolt sits centered in the widest panel so it stays visible when scaled down. It pairs with water bottle, protein shaker and energy bar icons. Below 20 px, thicken the bolt strokes.

This is the solid black filled version of the isotonic icon: a bold silhouette that reads clearly at 16-24 px and on dark or busy backgrounds, and prints well in one colour.

Download it free as a scalable SVG vector or transparent-background PNG in seven sizes (16 to 512px), copy the SVG code straight into your project, or open it in the free online editor to change colors, apply gold, silver, neon and gradient styles, animate it, or convert it to EPS, PDF and DXF.

Free for personal and commercial use with attribution.