Archaeological evidence suggests that people have been using tin for at least 5500 years.
Tin resists corrosion and is used as a protective coating on other metals. Tin cans are probably the most familiar example of this application. A tin can is actually made from steel. A thin layer of tin is applied to the inside and outside of the can to keep the steel from rusting. Once widely used, tin cans have largely been replaced with plastic and aluminum containers. Iron, steel and tin are paramagnetic materials -- so regardless of the composition of your "tin" can, it will be attracted to a magnet.
Here's a quick park and grab although the many businesses in this area may provide just enough distraction for you to explore a bit more and stay awhile. You are looking for a micro container with only a log sheet inside. Please bring a writing utensil to sign the log. This can be a very busy location especially during the weekends. Please utilize your geo-stealth skills and return the cache exactly as found. Most of all: have fun!