Halo: The Master Chief Collection - Halo 2 - High Altitude Thirst! - Halo 2A MP: Found and destroyed the BLAST soda can on Zenith. This achievement is fairly easy to unlock.
On the map Zenith, once you spawn in acquire a sniper, easiest if you set the game mode to team snipers. Find the blue crate near the edge and hop onto it.
Look down and you should see the blast soda can.
Shoot it and your achievement should pop! Enjoy!