I recently purchased the canteen along with the canteen straw and the canteen kept falling off of my ruck trainer during my ruck. I bought the ruck trainer back in December and it came with the molle lower back panel and I placed the canteen on the panel and strapped it as tight as possible but it still kept falling off every half mile or so. I noticed also, when the canteen was close to empty after a few miles, there was no way to strap it any tighter to keep it in place. Is there a solution to this? I would greatly appreciate it if theres a solution regarding this issue. The ruck trainer is great!