Reddit mentions of Collapsible Coffee Dripper for Backpacking, Camping, RV’s, Travel, Home, and More! Compact, Portable Filter - 100% Natural Silicone BPA-Free

There are a lot of really cool camping things! I'll be back to edit this post on my computer with some things that we like / are unique /cool

EDIT - these are things that we use that we love. These things all range in price, so hopefully you can find one or two to fit whatever budget you have.

• Collapsible Coffee Dripper : They can use this to make REAL coffee on the trail. They just have to heat water!
  
• Portable camping grill : This takes a little time to set up, but it's a very compact grill and makes it easy to cook food or even just balance your mess kit
  
• Nonstick camping mess kit : A nonstick kit is much easier to clean than a stainless steel one IMO. this set has a kettle, utensil, and scrubber which is awesome.
  
• Camp Suds : An environmentally safe soap so they can clean their gear but preserve the trail!
  
• Dry sacks : Dry sacks are just what they sound like... waterproof bags that keep your stuff dry. They can also double as a pillow if you stuff clothes in them!
  
• Portable camping stove : This little guy connects to a small fuel canister and gives you a nice little stove. These are great for heating water / soup as they provide a better heat source than a fire you'd build.
  
• Food dehydrator : This is not something they'd take camping, but it can really help them to save money on meals. If they are backpacking, they likely won't want to carry around cans of food and won't be able to carry around ingredients that would go bad. The dehydrator allows them to make their own backpacking meals that they will reconstitute with water.
  
• Pocket bellows : allows you to stoke the fire without having to get your face super close. Also this lets you target a small area.
  
• LED light bulb ; This does require a portable battery but it's really great to have this little guy. We use it in the tent at night or when we're hanging out but need a little light to chop food/etc.
  
• Pocket chain saw : Cut big pieces of wood! It takes some muscle, but it really does work and it's a lot smaller than a hatchet or actual chain saw..
  
• Literally the best backpacking chair : when you're backpacking, you have to carry EVERYTHING with you. So that means that stuff has to be light and small. These chairs are great, because (for chairs) they tick off both of those boxes. They have a back! And they are big enough to actually sit on!
  
  Other general items that are useful: Climbing/heavy duty carabiners (to clip stuff to other stuff. you can even get locking ones); water filters (if you get a Lifestraw, I recommend the water bottle. The actual Lifestraw is an interesting idea, but we've found in practice it's a little awkward); hammocks with nice straps; base layers; battery-operated lights of any kind (especially ones that clip or are hands-free); a set of waterproof cards (to pass the time on a break); nice, wicking socks; hiking poles; a camping knife.
  
  I haven't tried Cairn (the camping sub box) but they always look interesting.