If you were stranded on a desert island what two items you would take with you and why?

My list of necessities to be stranded on a desert island with would include a machete, alcohol, matches, a tent for shelter, sunscreen, bananas and peanut butter and a water filter/purifier.  If I had to choose only two of the aforementioned items to be stranded with, than I would choose a water filter/purifier and a machete.

I would choose the water filter to ensure safe hydration and the machete to cut down food growing on trees, to cut down vines, wood and leaves to build a shelter and raft to sail off the island and lastly to help create a spark to build a fire to keep warm and keep any potential predators away.  In addition to the water filter/purifier keeping me safely hydrated while stranded, it would continue to do so while heading back to civilization on my makeshift raft.