Products I Swear By
Here is a compilation of stuff I own/use that I would absolutely recommend to other people. Many of them are "Buy It For Life" (BIFL) which means you'll be using them for the rest of your life. These are generally dumb items that have few moving parts. I will focus on brands when it does matter.
Solidteknics AUS-ION Cookware
My go-to cookware are Solidteknics AUS-ION pans with Solidteknics being the only known manufacturer of wrought iron cookware. Wrought iron seems to be somewhere in between cast iron and carbon steel and you get the best of both. Either that or it's just carbon steel with a fancy name for marketing purposes.
I love these pans as they are a one-piece so you'll never have to deal with pieces falling apart, they don't depend on a nonstick coating based on forever chemicals and they hold heat exceptionally well. You do need to maintain them by seasoning them with cooking oils but it's easy once you've done it a few times. They are super expensive though.
I have several in different sizes in a mix of their flagship and lightning variants. While I do believe the lightning variants are inferior, as the thinner material means a higher likelihood of warping, I would not let a good deal pass by just because of it. (I, personally, would only use the flagship variants on unstable heat sources like campfires.)
Solidteknics also has a range of stainless steel cookware called nöni. I have a single nöni pan and it works well but it may not necessarily the best in its class. For that, you may want to look into clad stainless steel cookware. Despite being single-ply, nöni is supposedly more conductive of heat than other stainless steel pans due to the absence of nickel but I'm not sure about that.
Silicone Collapsible Cup with Lid
I carry a Sea to Summit X-Seal & Go Mug everywhere I go. It's, unfortunately, discontinued but you can find similar products by other manufacturers. (The closest item in Sea to Summit's range is the Frontier Ultralight Collapsible Cup but it doesn't have a lid.)
I already did a larger write-up on it but this thing is so versatile. You can use it to store snacks or leftovers, use it as a scoop, and, unsurprisingly, use it as a mug or a mini bowl. I wouldn't try to use it as a reusable cup when getting takeaway coffee due to it being a bit flimsy.
Titanium Pot
Titanium pots are great for boiling water and heating soups and noodles and pasta. You can also use it as a mug or a scoop if needed. Stainless steel pots are also fine but they are nowhere near as light. I have mine every time I'm on a multi-day hike.
The one I have is a 750mL Toaks pot that comes with a lid. In my opinion, it's great size for a single person.
Titanium Spork
Titanium cutlery are great due to their light weight. The main benefits are knowing that you always have something on hand to consume messy food with and knowing that you aren't contributing to single use cutlery waste.
Mine is one from Kathmandu which seems to be discontinued but the exact one doesn't really matter as long as it's from a reasonably reputable brand (due to food safety reasons).
This is a product that's borderline greenwashed as a stainless steel piece from your kitchen will do the job exactly the same but if you're carrying it everywhere and everyday like I do, the weight saving is worth it.
Travel Bidet
Bidets are a wonderful invention and being able to take one anywhere you go is a game changer. With a travel bidet, you'll be cleaner than what you could achieve with toilet paper alone and you no longer even need to consider toilet paper at all. If you're somewhere remote, you don't need to bury it or pack it out. If you're using a public toilet, you won't have to dread the situation where it's all been used up.
I use a CuloClean as it's very light and compact. I do use a Hydrapak Stow 500mL as a dedicated bottle but this isn't really needed as it fits in most standard bottles you can get from the supermarket drinks aisle.
Osprey Backpacks
I have many backpacks for different occasions and they're almost all by Osprey. Osprey backpacks aren't the most fashionable and they're on the higher end in terms of pricing but they are well known for their comfort and quality. You'll be able to carry heavy loads without wondering if the construction will fall apart. They aren't quite BIFL (no backpacks are) but their warranties will give you some assurance.
Portable Water Filter/Purifier
If you don't have a clean source of water, you're going to be in trouble. You only really need to be carrying a water filter/purifier when you go somewhere remote or somewhere with questionable water and most of my experience is with the former. Water filtering and purification is a long topic and I have no intention to go into detail here. (Snowys Camping Show has a good episode on this water filtration.)
When I go hiking I always carry Sawyer filters. Neither are BIFL as they will clog to the point of being useless eventually but the filtration rate can be restored with the right techniques to the point that they'll allow you to filter more water than you'll need to in your life. I carry a Sawyer Mini when I expect to be able to carry all the water I need. When I know I'll need to filter water, I carry a Sawyer Squeeze as it has a higher filtration rate.
In addition to one of the Sawyer filters, I have a backup method to obtaining clean water. In the past, I've used "Potable Aqua" tablets which worked well. I now have Aquatabs tablets and a Grayl bottle as backups which I haven't yet tried extensively.