Brita Hard Sided Bottle Water Filtration system, Hard Sided, Purple Designed, 23.7 Ounces, (Pack of 3) 23.7 ounce hard sided water filter bottle with 1 filter, (Pack of 3) 1 water filter can replace 300 water bottles Filter sits inside water bottle, reducing particulates and chlorine taste and odor, 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