BeardedBruce, if an explosive can be made (from substance that aren't likely to be detected in the airport screening) just by pouring one from each soda bottle into another container, then just don't allow any liquids on board except in the locked overhead bins.

But you'd better put prescription meds and baby formula in the locked bins, too. Make the passenger have the flight attendant supervise the access to those, as needed.

But the question remains: Since we've known about this type of bomb for decades, what good reason is there for the sudden hysteria about them NOW?   

Airplanes and buildings have been brought down many times before without using liquids mixed together inside the passener cabin.