Why do you think you need to spend $75-100 for a daypack? What are you planning on doing with it? For backcountry skiing or SAR work, a heavy duty pack, as already discussed, would be worth the cost, but just for day hiking, I don't see the point.

As I have posted in other threads on this topic, my day pack is a small teardrop pack that cost me nothing, free, and it has lasted more than 20 years. No hydration sleeve, but I don't like them, so no big deal. It will hold a jacket, some food, a couple of water bottles and some misc stuff. I'm not going off trail with it, so don't have the whole "ten essentials" in it. I have a bigger pack for that kind of hiking.

There are lots of really nice day packs out there, but every time I look at them, I look at my pack (which pretty much is my constant companion) and think "is that $100 pack really all that much better?" annd the answer is no.