the market sells alot of them but believe it or not many sold are not designed to work properlly. A boost bottle must be mounted inchs from the intake to have its affects noticed.
All the boost bottles ive seen have a 2 foot hose coming off the intake so you can mount it to the bike......THIS WONT DO sh*t!!!
Even a proper built one will only give minor improvement its just all inn what you wanna do.
2-Stroke-Porting.com
^This one mentions the boost bottle and tube but no tube is needed it would be better to have the bottle installed into the intake