Isotonic black outline icon
Sports drink bottle with nozzle cap and a lightning bolt on the label
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About the Isotonic black outline 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 black outline version of the isotonic icon: even, monoline strokes that stay crisp at small sizes and suit clean, minimal interfaces, wireframes and light backgrounds.
It downloads free as an SVG vector or transparent PNG in seven sizes, and the free online editor lets you recolor it, apply gold, silver, neon and gradient styles, add animation, or convert it to EPS, PDF and DXF.
Free for personal and commercial use with attribution.
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