An upstart beverage company's stock has outperformed most of its competitors over the last two years. All it took was a coconut.An underrated beverage company, Vita Coco (COCO 3.37%), has been on a tear since it went public in October 2021. After getting through a volatile first year on the market, the stock has managed gains for four consecutive years, climbing 46% in 2025 alone (as of Dec. 15). Compared to another upstart beverage company, Celsius (CELH 1.50%), it appears to be doing even better.Celsius' ...