>>2788311There's more to your health than just your knees. If you go out regularly (which I doubt, since you'd be trained enough to avoid injuries to your knees if you did), you're going to want to think twice about what chemicals your canteen ight leach into your drinking water. That means either glas or stainless, and since "unbreakable" glas (aka borosilicate lab glas) is fucking expensive, stainless is the way to go.
Just like using an ultralight pack is a retarded idea, as even though it will bring les load on your knees, the unstable design will bring way more stress on your back than a framed pack of comparable size, even if that frame adds another 0.5-1kg.
Instead of wasting money on crappy UL gear, try improving your skills so you need less gear in total.
Case in point, my normal (non-winter) overnight loadout is mostly milsurp and barely weighs 2kg, water and food included.
It's literally just a canteen pouch on a sling with a stainless canteen / pot / cooker set, a water filter, a spoon, a lighter and some noodles, plus a knife in my pants pocket.
That's literally all it takes to get by in non-freezing temperatures below the tree line if you know where to find fire wood and natural shelter.
Also, your knees are literally made for walking. If you have proper shoes (= flat, flexible soles) and walking posture, and if your muscles are trained well enough to support your joints, you're not going to get joint pains until your in your 80s. Most joint problems come from improper movement patterns, where the joint is crushed together instead of folding the way it's meant to. A classic example would be walking in such a way that the heel makes contact first (removing the dampening effect your calves have) while the knee is still fully stretched (removing the thighs). That forces the meniscus to take all the strain, and will destroy it over time.
