I use these fine point Sharpie markers every day at work and at home. We own a restaurant in Ohio and we have very strict rules that we have to follow according to the health inspectors. We must date mark every food item that we have in the restaurant. This means that every time we open a package, make salsa or cook fresh foods, it must be marked with the product name and the date. We then have 7 days to use this product before it has to be discarded.
This type of marker pen is very useful because I can clip it to my apron pocket and have it available when I need to mark something. I carry around a roll of masking tape and when a product needs to be marked, I get out my marker pen and write on the masking tape and put the tape on the product or storage container. Then I am all set.
You can also mark on the storage container if you prefer. It is a permanent marker so make sure you really want to do that forever. It would be a great pen to mark lunch boxes and bookbags that your children take to school too.
I prefer to use the black, blue and red markers at work. These are the easiest to read on the labels. The green and the yellow markers that come in the set don't get used at work. Those I take home and use for marking calendars.
If you are looking for a great way to mark your belongings, check these out. They are very inexpensive when you buy them in a 5 pack from Office Max!