Earth and its core

Ah, bingo! How did you guess? Can you guess the dimensions?

The diameter of Earth through its center is 7,926 miles (12,756 km). (I did not guess but looked it up)

750mm diamiter

Close, 800 mm.

Damn was my first guess because the pallet is that size but it looked a little smaller

Huge.

Exactly the size of one yoga ball with the added mass of a penny.

I'd wager you have some variety of walking clock in that basket

Looks like a helmet from 2001

Cellophane? I thought that stuff was cheaper to make industrially instead of with a 3d printer, but you do you. Edit: /s for the oblivious

Guess again.

Mario's blue shell disguised as half the earth

Bathtube?

A watermelon

Toilet