Aluminum, specifically aircraft aluminum is UL and cheaper than titanium. In fact right now I am drinking from my GSI Halulite Minimalist cup made of a aluminum blend. At dinner last night with my aircraft aluminum long handled spoon. I drink from aluminum cans because I can recycle them.

I can't live my life based on scientific studies that are inconclusive or considered 'suspected to' or 'linked to' any of the hundreds of illnesses that humans can get at some point in their life from a lot of different things. If there is a definitive position on something being harmful like say smoking 3 packs a day for 20 years, then I'll start considering changes.

A glass of wine a night will kill you one week, will make you smarter the next.

Cell phones will give you cancer one week and stimulate brain function the next.