Temporary Hair Dye that will ONLY last for a week?

I'm going on a week vacation and i wanted to dye my hair a crazy color. The thing is i can't have that color when i get back because of my job, so i need it to come out easy and fast but not too fast, so that i can enjoy it. Also, my hair is already dyed an auburn color but it was done months ago, but of course is still there.

Plus, i will be going in numerous pools on my vacation.

Is there anything that will work for such conditions?

Thank You

Temporary Hair Dye that will ONLY last for a week?

There are several non-permament dyes/rinses that will wash out in 12-24 shampooings. Go to Target, Walmart, Meijer, etc. and just take a look. I do this all the time just to change my look around (although nothing too drastic because of work - except for one time when I was applying the color and my washer hose broke and I had to clean up the water - well needless to say I had left the dye on much longer than I was supposed to and my hair had a deep purple tint to it). Have fun with it and enjoy your vacation.

Temporary Hair Dye that will ONLY last for a week?

just go to walmart and ask someone in the hair aisle.