OPC, I used 'Enerjel', (the others I tried were 'invalid', 'getpowered', 'Oneup', 'getfused10'), but you can only order one at a time.
FYI, if anyone has already signed up, they will automatically send you an email, and I believe you have to order the Enerjel, although I ordered anyway, but it seems implied to order more.
GO FUSE!
GLTA