Just buy a replacement bladder. There are several sellers on eBay with prices from $10 to $13 including shipping. https://www.ebay.com/itm/355720684541 https://www.ebay.com/itm/155399019649
I was given a Camelback by my sister-in-law and after using it one time it hangs in a closet for more than a decade. I too did not like the taste of plastic common with these packs. My water bottle cage holds a 20 oz Gatorade bottle. I live in an area with enough parks so I can refill the bottle well before I need to.