Well, first I would go to your local donut shop and get a frosting bucket. Usually they give them out for free and use that for your primary.
Your glass will be fine until 1.015 if you want. I have never brewed fruit in a glass jug, other than JAO. So I really cant help with experience, however through thought..........you probably wanna rack off your lees at around 1.020 due to the taste of yeastiness. You also have a sludge with tons of seeds that with over tanin your mead. IMHO
1-27-10 broke my hydrometer