The Mobius Strip is one of the three 4D objects.
How to obtain:
1: You will need to collect 3 coca and give it to the Coca Nut Cowboy at night in the 2nd island.
2: You will need to collect 3 coca and give it to the Police Officer in the Police Station.
3: Find The Dimensional Drifter and buy the Mobius Strip from him for $100,000.