Silicone e-cigarette mouth drip tips have several features, including:

1. Comfortable to use: Silicone is a soft and flexible material which makes it comfortable to use, especially for extended periods of time.
2. Heat-resistant: Silicone can withstand high temperatures and won't melt or warp when exposed to heat from the e-cigarette.
3. Non-toxic: Silicone is a safe material, free from harmful chemicals or toxins that could potentially leach into vapor or harm users.
4. Hygienic: Silicone is easy to clean and can be sterilized with boiling water or alcohol. It also doesn't absorb flavors or odors, making it a hygienic option.
5. Versatile: Silicone drip tips come in a variety of shapes, sizes, and colors, making it easy to find one that suits individual preferences.

silicone e-cigarette mouth drip tips offer a safe, comfortable, and hygienic option for vaping enthusiasts.