k-cups get quite warm when in use so I'd avoid it for daily use. Try a french press with a glass container instead. I also threw away my Aeropress for similar reasons.
I can't find the reference now but at one point they discussed why they don't offer an aeropress in stainless steel or glass, and it's basically because of safety (metal and glass transmit heat much more than plastic). Additionally with glass, even pyrex, there is a risk of breakage.
