Hmmmm....you're hurtling down a hill at 45mph riding 16 pounds of advanced composites, attached to the road with about 1.5 square inches of rubber, and you're worried about catching cancer in 25 years?!?
Do you have sunscreen on?
Are there cars on the road with you?
Have you instructed the sweet woodland creatures in the area not to run out in front of you?
Do you wrap your head in aluminum foil before you use your cell phone to cut down on the death rays it generates?
Option 1: Don't worry about it. The minute you're born you begin to die. Deal with it.
Option 2: Spend $10 and get a couple of new water bottles made out of whatever material you wish.
Either way, I guarantee that you'll be dead in the next 100 years.