I.Poor design, difficult to use Excessive residue at the bottom of the bottle: Especially for thick lotions, creams, or foundations, the non-pressable bottle design results in a large amount of product residue remaining on the bottle walls and bottom, causing waste. Dropper too short: The dropper for serums is not long enough to reach the last bit of product at the bottom of the bottle. Insufficient pump pressure: For airless bottles, improper pressure may prevent the product from being fully dispensed, or the pump may malfunction from the start. Inadequate opening design: Cream jars may have openings that are too narrow, making it difficult to insert fingers; cream jars may lack a spatula or a fixed spatula, leading to contamination; dropper openings may be too large, resulting in excessive dispensing at once. Mismatch between capacity and application: Small-capacity products (e.g., 10ml serums bottles) may have excessively large packaging, while large-capacity lotion bottles may be t...