New cylinders can get a little pricey but used bottles can be found dime-a-dozen on Craigslist/FB Marketplace/etc. Just need to know how to properly inspect a tank. Gas supply stores can get really particular about BYOBottle because of the safety/liability component, but they'll typically treat a no-fill tank as the deposit for a new tank in much the same way consumer propane tank exchange works.
Boost is likely the way to go for OP. I first saw them in Walmart in 2012 as a freshman at a military college. They made the surprise cadre workouts and X mile rucks suck so much less that I'd buy them all up when we were on liberty to sell out of my supply box. Really clever bit of kit, and the mint scent was a nice touch.
Boost is likely the way to go for OP. I first saw them in Walmart in 2012 as a freshman at a military college. They made the surprise cadre workouts and X mile rucks suck so much less that I'd buy them all up when we were on liberty to sell out of my supply box. Really clever bit of kit, and the mint scent was a nice touch.