do i need to sort out the cans, plastic and glass bottles? is there a limit how many can be redeemed?

Only glass needs to be separate for safety issues. Everything else can be mixed. Theres no limit but if you have 5 or more big big bags if we are busy we do tag them n just come back to pick up money or it can be mailed to you. We will take them with the glass if its not more glass than other and we still take them. Like i said WE do take them

They won't take them if there are glass bottles mixed in. I believe plastic bottles in with came cans are fine.