The best replacement for camelbak is nalgene.

The best alternatives to camelbak are rated as following:
★★★★★  nalgene
★★★★  osprey
★★★  platypus
★★  water bottle
★★  contigo
★★  klean kanteen
★★  source
★★  polar bottle
★  hydrapak
★  hydration belt
★  tervis
★  brita
★  geigerrig
★  maxpedition
★  sigg
★  canteen
★  high sierra
★  bobble
★  osprey hydration
★  fuel belt
  5.11
  hydrastorm
  nathan
  north face
  dakine
  kelty
  osprey bladder
  nathan hydration
  deuter
  water belt
  blackhawk
  brita water bottle
  water bottles

Your alternative for camelbak is not listed? Suggest!
Speaking about camelbak, one probably shouldn't forget about molle.

Other search terms related to camelbak and their ratings are:
★★★★★ molle
You have in mind a companion for camelbak and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of camelbak in all years. Click on graph for more.
camelbak
nalgene
osprey