If you are looking to lose weight, drinking energy drinks or even V8 is not going in the wrong direction. I do not think you are sweating enough in one hour to need more than plain water. I would skip the V8 unless it is part of your normal eating habits.
2000 Montague CX, I do not recommend it, but still ride it.
Strida 3, I recommend it for rides < 10mi wo steep hills.
2006 Rowbike 720 Sport, I recommend it as an exercise bike.
1996 Birdy, Recommend.
Wieleder CARiBIKE (folding), decent frame.