I really enjoy mega carts. I live in Australia, and order from China, and while the old style 510 carts come pre-filled with cotton, (and sometimes juice,), all the mega carts I've bought have been empty and do not have any cotton in them. I'm having to take cotton out of the smaller 510 carts and put them into the mega cart. This seems odd. Is anyone else having this issue, or have a better idea for how to fill the cart with a material that will hold juice?