The reusable bottle on everyone's lips! And for good reason. frank green's signature 34oz/1L Ceramic Reusable Bottle is triple-wall vacuum insulated to retain temperature for hours (and we mean hours). Plus, the ceramic lining ensures your water tastes like water (no metallic flavours here). -Multi-award-winning product design -Durable stainless steel bottle – made to last -BPA free, fda & eu approved safe materials -Available with our easy-to-use straw lid -Dishwasher-safe lid. Base is handwash only -Microwave safe: no