Gold, Classic & the Clip Cap – The Complete Koswork Fuel Bottle Lineup
Every nitro racer knows the pit routine down to the second — pull the car in, top off the tank, get back on the track before the heat cools down. That’s exactly the moment where a good fuel bottle earns its keep, and it’s why Koswork builds a complete lineup around it: the KOS09002 Gold 700ml Fuel Bottle, the KOS09003/KOS09005 Classic Fuel Bottle in 700ml and 500ml, and the KOS09008 Silicone Fuel Bottle Clip Cap w/Strap that works with all of them.
What the Bottles Share: The 9mm Tube That Actually Flows
Both bottles start from the same core idea. The body is molded from flexible plastic that you can squeeze hard without fighting it, which matters more than people think during a quick pit stop when every second counts. Both also use a 9mm OD aluminum tube with a 7mm ID, a clear step up from the 8mm size common on other brands’ bottles. That extra bore means fuel actually flows when you squeeze, instead of trickling through a bottleneck while your car sits idle waiting to go back out.
KOS09002 Gold 700ml – The Robot Cap
The Gold 700ml bottle has a body diameter of 80mm at its widest and stands 315mm tall, and it comes fitted with the KOS09002CAP nylon robot-style clip cap. It snaps shut positively and looks sharp sitting in your pit box, which some racers genuinely care about when everything else on the bench is black and grey.
KOS09003 / KOS09005 Classic – Pick Your Capacity
The Classic series ships with the KOS09003CAP rubber cap and keeps a clean look that’s been a staple in pit boxes for years. It comes in two sizes: the KOS09003 at 700ml (80mm body diameter, 315mm tall) for a full race day, and the KOS09005 at 500ml (75mm body diameter, 290mm tall) for anyone who tops off more often or just wants a lighter bottle to carry around.
KOS09008 Silicone Clip Cap w/Strap
The KOS09008 is designed to fit most RC fuel bottles on the market, not just Koswork’s own, and it’s built from high-elasticity silicone that snaps onto the fuel tube with a simple press. An integrated retention strap keeps the cap from getting lost mid-session, which is the kind of small detail that saves you from digging through your pit bag between rounds. It runs about 100mm overall and comes in blue, black, red, or white, so you can color-code bottles for fuel type or just match your pit setup.
If you’re deciding between the two bottles, it comes down to how you like your gear to work and look — the Gold bottle for a firmer, sharper-looking seal, or the Classic bottles for a proven design where you pick the capacity. Add the KOS09008 clip cap to either one and you’ve got a bottle you won’t lose track of between mains. Made in Taiwan, cars, tools, and parts not included.
