Brita Hard-Sided Water Bottle Filter, Blue, 23.7 Oz 23.7 ounce hard sided water filter bottle with 1 filter 1 water filter can replace 300 standard 16.9 ounce water bottles Filter sits inside water bottle, reducing particulates and chlorine taste and odours often found in tap water Durable BPA free water bottle features carrying loop, easy-sip straw and is top rack dishwasher safe Replace filter every 2 months with black Brita Bottle Replacement Filter item number 60258 35818