When assessing value, focus on the filling accuracy (ideally ±0.5% to 1%) to minimize product waste. You must choose between gravity filling (best for thin liquids like water) and flow meter filling (higher precision but more expensive). Ensure the machine uses 304 or 316L stainless steel for all contact parts to meet food-grade hygiene standards. Additionally, check the production capacity (BPH - Bottles Per Hour); a machine's price is heavily dictated by its ability to handle specific ranges, such as 2,000 to 24,000 BPH.