So I just got done telling you not to drink and drive…in a car. However, I didn’t say anything about biking, though exercising (get it?) caution is always a good idea.
As is this 6 Bottle Saddle Bike Bag..a good idea. It hangs over the center bar and stays put by sticking together at the base thanks to a set of Velcro strips. Each bag can hold up to 6 beers/sodas and is completely waterproof just in case you spill or get caught in a down pour.
According to Firebox, it won’t interfere with your stride, or massive calve muscles, though odds are if you’re simultaneously drinking and riding on your bike you’re out for some leisurely activity.
You can buy the 6 Bottle Saddle bag for about $50.