I found several search results related to white waterline pencil product details, positive and negative aspects, and ingredients or materials. Here is a summary of the information I found:

• White waterline pencils are used as an eyeliner in the waterline or inner rims of the eyes to make the lashes look fuller and the eyes brighter.
• They are soft, waterproof, and long-lasting, making them easy to apply and suitable for lasting makeup application.
• They are formulated to be safe for sensitive eyes and contact lens wearers, and have been dermatologist and ophthalmologist tested and approved.
• They are vegan-friendly, paraben-free, and gluten-free, and do not contain harsh chemicals.
• Some white waterline pencils are pearlescent, which can add a subtle shimmer to the eyes.
• The best way to apply white waterline pencil is to stop right where the whites of the eyes are for a more natural-looking application.
• Some white waterline pencils are available in travel-sized options.
• Some white waterline pencils are mineral-based and do not contain titanium dioxide or mica.
• Some white waterline pencils are formulated with vitamin and antioxidant-rich ingredients to soothe and revitalize the eyes.

In summary, white waterline pencils are a popular makeup tool used to enhance the eyes. They are soft, waterproof, and long-lasting, and are formulated to be safe for sensitive eyes and free of harsh chemicals. Some pencils are pearlescent, while others are mineral-based or formulated with vitamin-rich ingredients. The best way to apply white waterline pencil is to stop right where the whites of the eyes are for a more natural-looking application.