Share 'Vertical zippered bags for packing protein powder?'

For long rides, I like to pack my own protein powder, which I'll add to an orange juice from a gas station. I've tried the little Ziploc baggies that are wider than they are tall, but the problem is that the powder doesn't all go in the bottle :-). I've packed a collapsable funnel, but that just gets annoying. Trying to find a tall, narrow bag whose circumference when you unzip it is smaller than…