Is zaino stuff okay to leave out in the cold all winter? I left mine out all winter in an unheated garage. I hope i didnt ruin the stuff.

hmm is it all frozen? read the labels there should be a section where they tell you to store the stuff and at what temperature...

It will separate. You'll see the different layers in the bottle. You will need to shake it a lot to get it mixed. If possible, keep it inside for a few weeks before you use it.