My previous pump, Accu-Chek Insight, took glass NovoRapid pump carts. Because it was a tubed pump, it did not waste insulin. I was given my current pump (also tubed) three years ago but, unfortunately, it has plastic reservoirs. At the time, the hospital did not offer Ypsomed pumps (those use glass pump carts) but that would have been my preference.
It is just a personal thing with me, from some twenty years ago, when I had breast cancer and I read how it would be best to avoid anything plastic. I cannot even remember who advised me. Even now any bottled water I buy will be in glass bottles. However, rightly or wrongly, I decided to take the risk with teflon tubing.