I agree too, FB. If somebody else wants to stop to drink, that`s fine, and I often do it myself. Not having the option to take a quick sip while pedalling would suck for me.

My take on your original question is that it does get easier to multitask on my folder ("folder" being a very general term, since there`s a huge span involved), but still hasn`t gotten as easy as on "other" bikes. There`s definitely been progress along those lines as I got used to the bike, and rolling with one hand for a few seconds for a drink is always possible, should be for you too, with a bit more practice and getting accustomed. Although... even after riding only my folder for several days at a time, I still weave when looking over my shoulder, still fumble with the bottle basket (partly because of the stupid position it`s in), fishing anything out of my front bag and employing it (granola bar, camera, etc) is only for good road/traffic conditions and within a certain speed range, and if conditions aren`t completely perfect, I`d never think of removing both hands to zip my jacket or press the backlight button on my watch. None of those present any problem at all on my touring bike, and much reduced problems on my road bike, my recumbent, or our tandem.