Review on 3 Pack Silicone Case for Apple Pencil 2nd Generation: Cute Grip Sleeve & Protective Covers for iPad Pro 11 12.9 inch 2018 - Purple, Pink, Black by Alfred Paiz

Easy to install and remove. The silicone isn't so thick that it's uncomfortable to hold the pen, and you get multiple colors so you can switch things up. The cap that fits over the tip of the pencil is probably travel-friendly, but I don't wear one because I primarily use my iPad for drawing and I found the silicone tip hampered the pressure sensitivity a bit. Anyway, for the price it's great.