My wife got a nexus letter from her doc. Please advise. : r Ceramic Reusable Blushed 595ml Bottle with Straw Lid. Fits perfectly in standard size car cup holders! Classic curves, perfect proportions, and custom colours are just the start of what makes the Frank Green Ceramic Reusable Bottle so special. Multi award winning product design Triple wall vacuum insulated to retain heat or cold Durable stainless steel bottle, made to last Ceramic lined for a better taste experience BPA free, FDA & EU approved safe materials Dishwasher safe lid. Base is handwash only.