Please choose the correct solution to the question: To put a hole in the bottle cap pendant to thread a chain or a string through.

Solution1: Use a 1.8 mm punch pliers to punch a hole on one side and repeat on the opposite side, so you have two holes lining up straight in the middle of the cap.

Solution2: Use a 10 mm punch pliers to punch a hole on one side and repeat on the opposite side, so you have two holes lining up straight in the middle of the cap.

Answer format: solution1/solution2
Answer: solution1