Do I need to buy tickets in advance?

It appears that there may be a misunderstanding. Alhambra primarily deals with bottled water products and related services, and does not host events or venues that would require ticket purchases. If you are inquiring about an event or attraction related to the Alhambra, such as the historical Alhambra Palace in Spain, that is a different context altogether. Many attractions have varying policies regarding ticket purchases. Some may allow for on-site ticket purchases, while others encourage or require advance bookings to manage attendance and provide a better visitor experience. It is generally advisable to check the official website of the specific venue or event for the most accurate information regarding ticket purchasing requirements. This is especially important during peak seasons or high-demand times when tickets may sell out quickly. For detailed information regarding any specific attractions or events, visiting the current web page of the respective site would provide the most reliable guidance.