$11.00
Humangear CapCAP
Designed to work with Nalgene, CamelBak and other popular drinking bottles, the capCAP turns your wide-mouth bottle into something a lot easier to drink from. It's top-rack dishwasher safe (except for the strap) and 100% BPA, polycarbonate and phthalate free.
Note: the capCAP is not compatible with Klean Kanteen or Hydroflask bottles or the 16oz Nalgene bottle. A new version is being produced which will solve these issues.