loop
It honestly depends on if the water bottle is priced within good reason. I am not going to spend twenty dollars on a nike bottle if adidas has one for two dollars.
sipper
Reusing a glass bottle is not safe in the least bit. This is unless the bottle has been completely sterilized.
pull the sipper down then get inside then pull the sipper again up
Nike running watches have a great reputation, especially because of the Nike+ facility. They are highly recommended and are considered safe to use during exercise. They are a lightweight watch which does not interfere.
Nike is one of the best brands on the market, I would assume it is a safe bet.
Plastic
sipper
sorbedor = (a) sipping (b) sipper
yes. its a half frozen drink
Probably. It will depend both on the plastic the bottle is made from and its intended purpose.