5 pack refill bladder kit for your disposable hydration system that39s 100 taste free and bpa free it39s fast it39s hygienic it39s recyclable just replace the used bladder with a new and go bladders used only with drink water can be reused specifications durable recyclable taste free bpa free pvc free material petnype fit in most packs product care disposable bladder cleaning drain all remaining water and clean the bladder with mild soap a