I do. It seems to keep a few days before you need to make a new batch. I put it in a pint canning jar so I can shake it up well then pour a little in a bowl to heat it up when it's time to feed.
I do, too, and it keeps a few days for me, as well. I keep mine in a mug covered with plastic wrap, and wisk with a fork before use. Pint jar is probably better and less messy. :lol:
You can also freeze it. If you pour it into an ice cube tray, you can thaw one cube at a time for use.
If you use a microwave, make sure to heat only a few seconds at a time and stir well... it'll turn solid if you're not careful.