You can type a number and then dump in both the drop menu and the standard inventory management. Alternatively there is advanced inv management if you have no lag and feel llike holding the button down till you get where you want. That way you can dump 50/100 or 80 of 100 etc… rather than keeping them all together for no reason.
just open inventory/drop menu etc… > type number > right arrow, letter/symbol for item you want to dump etc.
If you are still interested in bottling them for some reason, there might be a way to do so, but I don’t know why you would, or how to do it. Unlike liquids there is no reason for bottling unless you worried about spoiling. (which you can’t be with powdered egg as it ever spoils.) There are recipes for canning.
The only ways to prevent food spoilage is to craft it into something that doesn’t spoil, or put it in a working mini-fridge such as in an RV (normal fridges in houses don’t work, since no power to keep things cold) or ice labs. I am not certain if temperature has a direct effect on spoiling, or if it is a simple check of is food in X location, though I suspect it is temperature these days.
