I put yellow gel food color into clear piping gel to resemble mustard for a Hamburger Cake. I have it stored in a yellow mustard squueze bottle but don't know how long Piping Gel lasts stored this way. I know if you keep it in the container it comes in it lasts for about a year or so from what I remember. Should I wash the plastic bottle out each time I use it or do you think I can keep it stored this way for other decorating.
It should be fine for a lonnng time.
Wilton says you can leave it in a plastic bag between uses so I can't see why it can't stay in the plastic bottle for a while.
I have had some in the original container for at least a year. I'm sure that it's fine in bottle.