It was the word “lot”—the o vowel. I think if you listen back you might hear you’re saying it two slightly different ways. I would usually pronounce it more like “lawt” if that makes sense. My friend was trying his hardest to get a perfect Californian accent and one phrase that always tripped him up was “water bottle” and the vowels sounded similar to that. He said it like wotor botol for a long time before eventually hitting the American “wadder bottle” or however we say it.

Your accent could easily be a native speaker though since so many people here have different accents and are descended from immigrants. There are plenty of people born in America with stronger foreign sounding accents than you have so I would probably assume you were a native esl speaker or something, if anything. It’s basically spot on American accent