They flopped in my purse. But I don't want my batteries falling out. It would be a tragedy if one was lost! More importantly, I don't want to risk a huge leak in my purse. I'd rather there be something to cushion/protect the bottle.
Now that you mention it, I saw some really little digital camera cases at walmart the other day. They had some bright colorful prints on them too.
Get another Ipro to keep your spare set of batteries in. Then you can just put it in your purse.