Yes but why make it simple when it can be deliciously complicated and intricate?

Yeah yeah, but consider that where you have failed, I, a complete beginner in these matters with nothing but a wild idea and my trusty ADHD interest span, shall obviously succeed! And you'll all see!

in my experience room temperature water is magically cold anyways, fuck knows how that works but it reliably does.
Like it's not ice cold or anything, but recognizably cool

I have a relatively cheap filter on the kitchen sink cold water tap, and I use ice in a large thermos style water bottle, but I too prefer cold/chilled to room temp. I can drink room temp fine, but I like it cold more.

I get it out of my fridge’s dispenser. Sometimes I put ice in there if it’s a hot evening. The flask cost me $10 which is cheaper than a Camelbak. Lasts me a few days between refills. Honestly a good life hack if you’re used to have a glass of water by your bedside.