Plastic Cap

1. Hermetic Seal
   Internal liner or plug‐type land mates with the bottle finish to block air ingress and product egress, preventing evaporation, contamination and leakage.
2. Child-Resist / Tamper Evidence (when specified)
   Some versions incorporate a break-ring or ratchet bead that fractures upon first opening, giving visible proof of tampering while still fitting small, portable formats.
3. Grip & Ergonomics
   Fine vertical ribs (knurling) let wet or lotion-covered fingers maintain torque control during one-handed opening/closing.
4. Visual Inventory Check
   Crystal-clear resin allows consumers and retailers to see fill level, color shift, or phase separation without removing the closure—reducing returns and overstock.
5. Dropper / Pump Compatibility
   Short, low-profile skirt keeps overall height minimal so the cap can nest over a dropper bulb, orifice reducer, or fine-mist sprayer without looking oversized.
6. Chemical & UV Resistance
   Clarified PP or PET withstands essential oils, alcohols, and mild acids; optional UV-absorbing additives protect light-sensitive actives (e.g., vitamin C serums).
7. Decoration Canvas
   Smooth crown and ribs accept pad-printing, silk-screen, or hot-stamping for logos, batch codes, or color-coding without obscuring contents.
8. Lightweight & Recyclable
   <2 g closure lowers shipping cost and is mono-material (PP or PET) to simplify post-consumer recycling streams.