There is a device made of Silicone,that Women can use to write their name in the Snow,It's called a SheWee,An ex-GF used one to great effect,she even managed to wee on the tree,next to me,lol!It doesn't work with every woman due to Anatomical positioning,etc.(her friend had a tough go of it),They were about $10,3yrs ago,I don't have any links but I'll bet if you googled shewee,you would get to what I'm talking about,they even had glow-in-the-dark/Neon colors!