Face cream jars and essential oil bottles serve distinct purposes: jars are designed for viscous products, with wide mouths for easy scooping and sturdy lids to maintain cream texture, while oil bottles feature precision droppers for controlled liquid dispensing. Jars prioritize user convenience and product visibility, while oil bottles focus on hygiene and dosage accuracy. Both are available in glass for purity, with jars often larger (30ml-200ml) and oil bottles smaller (5ml-30ml).