Gregory3D Hydro Trek 3L

Easy to fill, easy to dry, good bite valve. Packs well too. Way better than the last one I had that got moldy inside because the parts didn't detach for cleaning. This one comes apart for thorough cleaning.

This water bottle is extremely convenient to use. The size and shape are perfect for backpacking. I love that it holds its shape in pack unlike other water bottles.

I like the format of this water bladder and the versatility of the multi-position design + push-button pour spout. However the spout of the bladder I received is leaking when pressure is applied to the bladder (which is always the case in a backpack). Maybe I got a bad one. Besides that, everything is perfect about this water bladder!

I was so excited about this hydration pack for the 300 mile through hike that I'm planning in a couple of weeks. The design is fantastic, especially with many nights camping without a water source. I love the shape, that I can just place it near the top of my pack, the spigot seems to work great, the bit valve isn't the highest flow, but seems to be the design of most higher end hydration packs.When I first opened the package, I was overwhelmed by the weird plastic smell of the reservoir. I ended up washing it, soaking it in lemon juice for a couple hours, adding baking soda and soaking more. washing again, and again, and again..... (on a positive note, it is easy to wash, and does hold its shape and dry quickly). The water is undrinkable. It literally makes me gag. I tried to determine if it was the tube, or the reservoir - it is both.I'm not sure why all the good reviews. This tastes absolutely terrible and toxic, and makes me wonder if everyone who tried it and gave it a 5-star review either didn't use it, or had covid and lost their taste/smell. If you're sensitive, this is not the one for you.

I bought the Gregory 3D Hydro Trek 3L because of the good reputation Gregory backpacks have. After a few times using it, I do not recommend this product. The water opening to fill up the bladder is small, which makes cleaning difficult. The worst feature however is the tube leaks when you insert it into the bladder. I used this product at most 5 times. By the fifth outing, the tube didn't seal to the bladder causing water to spill into my backpack. Looking at Amazon's catalog, there are a lot more affordable options available that appear to have better features vis a vis cleaning and preventing leaks. This bladder also does not include a cap for the mouthpiece, so it is difficult to keep that area clean. For the price of $40+, I am disappointed.