You can use any container. I use a big 2 gallon jug with a spigot about an inch from the bottom. No, it does not need to be refrigerated. You don't even need to let the DE settle to the bottom, you can drink it without worrying about getting too much.
There is no smell or taste, but the water can be sort of cloudy at the beginning.
My son is extremely picky regarding smell, taste and texture. He drives us nuts! But he drinks this water without comment. To me that's the biggest testimonial out there.
I can't wait to see if this does anything further for my enamel. Some aches and pains are gone in joints along with the obvious things I stated before (hair nails, etc).