Aluminum foil. At least, it can kind of clean your teeth (and that aluminum is not longer scientifically associated with Alzheimer's disease. The studies that erroneously linked the two have been thoroughly debunked).
Would this skiing have to take place while it was cold out?
Skiing I guess.
Using your one-round-trip time machine that only transports you onboard historic vessels on the day that made them famous, would you go to:
The Mary Celeste
The Titanic
The Lusitania
The Santa Maria
The Bounty
The Beagle
Get a paper cut from a $1 million lottery ticket you bought that week or get poked in the eye (no subsequent injury) with a $1 million diamond ring which you found and now own?
Be trapped on the island of Summerisle of the terrifying and surreal Wicker Man (1976) movie or the island Summersisle of the legendarily bad Nicholas Cage remake, The Wicker Man (2006)?