Just went down the aliexpress rabbit hole again. Theres really everythinf for some of really niche things that i wouldnt ever buy, but some things really do look appealing. I wonder what do you guys use daily thats worth lets say under $20
Hit up the Goodwill or similar, you can find stainless bottles for dollars.
Local DI (deseret industries-a Mormon goodwill equivalent) has them for $1.50. Pick your lid, thermo flask, size, straw or naw. Get 6 for $9. Or buy 1-2 a bunch of times. My only transportation is cycling (other than busses/trains). Hydration is essential for proper functioning on all of these.