| Air Exposure | None. Best for preserving actives. | High. Air replaces product as it's used. | Constant. Every time it's opened. |
| Contamination Risk | Very Low. Sealed system. | Moderate. Air and bacteria can enter. | High. Fingers introduce bacteria. |
| Product Evacuation | ~95-99%. Almost no waste. | Low to Moderate. Product remains in dip tube and bottom. | High (with effort). Some waste is typical. |
| Aesthetic & Feel | Premium, Luxurious, Stable. | Functional, often plastic-feeling. | Can be premium, but less hygienic. |
| Durability | High. Shatter-resistant. | Moderate. Can crack or break. | Moderate. Glass jars can shatter. |
| Ideal For | Vitamin C serums, Retinol, Preservative-free formulas, High-end creams. | Body lotions, hand soaps, less sensitive formulas. | Rich creams, masks, products used sparingly. |