利乐包，泛指利乐公司（Tetra Pak）出产的所有包装产品，包括无菌利乐传统包（Tetra Classic Aseptic）、无菌利乐砖（Tetra Brik Aseptic）、利乐皇（Tetra Rex）等。利乐公司创办人卢本·罗兴（Ruben Rausing）从1943年起不断修改设计，在1950年时已经设计出一种用塑胶膜粘贴厚纸制造的不透气纸盒。1952年利乐传统包正式上市。目前全世界最常见的款式是1963年发表，外型为长方体的利乐砖。

Tetra Pak is a multinational food packaging and processing company of Swedish origin with head offices in Lund, Sweden, and Lausanne, Switzerland. The company offers packaging, filling machines and processing for dairy, beverages, cheese, ice-cream and prepared food, including distribution tools like accumulators, cap applicators, conveyors, crate packers, film wrappers, line controllers and straw applicators.