Needs a good cleaning
This is a vintage Boy Scouts of America (BSA) canteen, likely from the 1940s or 1950s. 
The canteen has a distinctive round shape and is housed in a rugged canvas carrying case with a shoulder strap. 
It features the classic BSA "Be Prepared" logo with a scout figure imprinted on the canvas case. 
The manufacturer marking visible on the canvas is "THERMADOR MFG. CO. LOS ANGELES". 
The canteen is considered a collectible item, valued by enthusiasts for its historical significance.