The Short Version: This appears to be a glitch. For some unknown reason the tenth bottle in the Tortuga level is only awarded for achieving “True Pirate” in Story Mode.
Finding time to play any video game is a challenge these days but I did manage to pickup my Nintendo 3DS and work on finishing Disney’s LEGO Pirates of the Caribbean. The various LEGO games have many hidden items to be discovered.
I managed to find every red brick, medallion, and all but one bottle. After all of this effort I wanted to achieve 100% completion. After all, not only is it rare that I actually play a video game to the end but it’s extremely rare that I complete every side mission and find every collectible.
Fortunately, the game shows the player a count of the items that have yet to be discovered and which levels they are located in.
In this case I was lacking a bottle in the Tortuga level (level 1-2). Finding the bottle proved to be frustrating; after numerous re-visits I was unable to discover this one item.
I had noticed that on other levels, when one achieves “True Pirate” by collecting enough LEGO pieces (referred to as “studs”), that a bottle is awarded.
After collecting and activating various multipliers it was easy to achieve “True Pirate” in Free Play mode. Yet, I still lacked this bottle so I decided to replay the Tortuga level in Story Mode.
Surprisingly, when I hit “True Pirate” again I was awarded the missing tenth bottle. It was at that moment that I also achieved 100% completion.
Perhaps it was a random glitch or maybe it can occur within other levels. I was unable to find this information on the Web after numerous searches though I did find a post by someone else who was asking a question that indicated that this person experienced the same problem that I had.
It’s worth mentioning that the 3DS version appears to be very different from the versions made for the larger console systems such as Xbox 360 and Playstation 3. The guides and walkthroughs describe level elements that don’t match up with the 3DS version.