What key combination of attributes did PET offer that was suitable for water and carbonated drinks?

Answer

Strength, lightweight properties, and excellent gas/liquid barrier qualities

PET was revolutionary because it provided necessary strength and lightweight characteristics along with excellent barrier properties essential for safely storing liquids like carbonated beverages and water long-term.

What key combination of attributes did PET offer that was suitable for water and carbonated drinks?
inventionMaterialplasticbottle