| Niche Market Appeal | Remains the standard for certain products where the jar experience is key: lip balms, solid perfumes, face masks, body butters, and paraffin-based products. |
| Primary Disadvantage – Poor Barrier Properties | PS is not a good oxygen or moisture barrier. This makes it unsuitable for formulations with air-sensitive active ingredients (like Vitamins C, A, many antioxidants). Product degradation can occur faster than in airless or even simple bottle/pump systems. |
| Hygiene Concerns | Repeated finger dipping introduces microbes, water, and contaminants, necessitating robust preservative systems. This conflicts with "preservative-free" trends. |
| Perception of Being "Less Advanced" | In the prestige skincare market, jars are increasingly seen as outdated compared to the protective, hygienic, and high-tech image of airless dispensers. |
| Sustainability Challenges | While technically recyclable (#6 plastic), GPPS is brittle and its recycling infrastructure is limited compared to PET or HDPE. Its single-use, non-refillable nature is also a drawback for eco-conscious brands. |

