Direct answer
Energy drinks are formulated, mixed, packed and checked as foods. The exact manufacturing steps vary by recipe, container and facility; there is no single production method that applies to every energy drink. EU food businesses must comply with food hygiene rules, maintain HACCP-based procedures and place only safe food on the market.
Original sources: [hygiene][food-law]
Formulation and ingredients
A recipe defines the target amounts of water, sugars or sweeteners, caffeine where present, acids, flavourings, vitamins and optional ingredients. Measuring and recording ingredients supports repeatability and traceability. Additives, where used, must satisfy the applicable EU authorisation and use conditions; an unfamiliar ingredient name alone does not establish either safety or harm.
Sugar and caffeine are separate formulation decisions. A manufacturer can make sugar-containing, sugar-free, caffeinated or caffeine-free products; their nutrition and labelling must match the final recipe.
Original sources: [additives][label][food-law]
Mixing, filling and preservation
Hygienic production includes appropriate handling of ingredients, clean equipment, prevention of contamination and documented control of relevant hazards. Producers select and validate a preservation strategy appropriate to the drink and package, which may involve heat treatment, hygienic filling, permitted preservatives or combinations. The cited EU rules do not establish that pasteurisation is automatically superior to permitted preservatives for every formula.
A description of a facility's actual heat treatment, process parameters or shelf life requires manufacturer or validated batch documentation; it cannot be inferred from the term energy drink.
Original sources: [hygiene][additives]
Containers, labelling and release
Cans, bottles and other food-contact materials must meet EU material-safety requirements. Labels must provide applicable ingredients and nutrition information; specified high-caffeine beverages require an additional warning and caffeine amount per 100 ml. Producers check finished batches against relevant safety and product specifications before release.
Making the can and beverage at the same location may simplify logistics, but location alone does not demonstrate higher product quality. Documented controls, valid packaging compliance and verifiable finished-product checks are more informative.
Original sources: [packaging][label][hygiene]
Traceability and corrective action
Under EU General Food Law, food business operators must be able to identify relevant suppliers and business customers, and act when a food may be unsafe. Traceable batches help a company investigate and, where required, withdraw or recall affected products. Legal compliance is a control system, not a promise that mistakes can never occur.
Original sources: [food-law]
Sources and scope
Each link identifies the evidence for the claims cited above. Rules and market information may change; check the source publication date and applicable jurisdiction.