No, you can leave the sleeve on the bottle and wash the whole thing in the dishwasher. The bottle and sleeve in tandem can be placed on the bottom rack of the dishwasher.
If you wish to remove the sleeve from a hydration bottle, baby bottle, or food storage container, it’s best to use warm, soapy water to carefully slide the sleeve off of the glass. To put the sleeve back on the product, use warm soapy water to slide the sleeve back onto the glass. Rinse off any residual soap from the bottle and let dry.
For beverage glasses and wine glasses, we do not recommend removing the sleeve from the glass.