Wanted a handle for this huge water jug so I can hold the drink with one hand. It holds with friction as the top is slightly wider than the bottom so no adhesives or screws and prints with no supports.

I suggest you print a slice of the very top and bottom rings to make sure the fitment is correct and account for different machine tolerances. Also print with minimum of 3 perimeters to strengthen the print to support the weight of the water.