I agree that stainless steel is bad for coffee (glass-vacuum carafes are cheap and effective), but it usually takes awhile, an hour or more, before I notice a significant change in flavor from exposure to steel. On the rare occasion that I cannot avoid using a travel mug, I use this thermos tumbler.
Braces cost is around $4000-$6000. Braces cost $3,000-$10,000 depending on location and also on what kind of dentist does them, general dentist (cheaper) or orthodontist (more expensive). In European countries Braces usually cost about $5,000 nowadays.
How much will your braces cost? The short answer is: in most parts of the US, two years of full traditional braces costs (on average) about $5,000-$7,000. Ceramic brackets are about $500-$1,000 extra. These costs do not include x-rays, extractions, or special appliances. Invisalign treatment (in most cases) costs about the same as traditional braces.