Loose camelbag systems or with Molle? Available in various camouflage colors like Multicam, A-Tacs-FG, OD Green, Black, Coyote etc.
The Camelbag or Hydration Carrier is one of the most functional tactical gear to carry with you, especially during the summer period.
Camelbags and the associated pouches are available in 1.5L / 2L / and 3L and allow you to keep drinking water during your game without having to walk to the safe zone every time. Of course, water gets pretty hot in the summer and it's a good idea to bring cool elements with you and put them in the camelbag against your water bag before you go into the game.