💧I need to drink more water. Any ideas on what I can do? 💦

So I'm temporarily staying with my mom. The 2nd floor stays pretty warm. I have to drink a lot of water because of my kidney transplant and I have a lot of meds to take. I keep a case of water upstairs but it isn't able to get/stay cool because we don't have a fridge upstairs. (Warm water is disgusting. but I force myself to drink it sometimes with my meds and sometimes I gag).

Is there anything I can do to have cool water to drink without having to go all the way downstairs to grab a bottle all the time?

I've looked into tumblers that are able to keep water chilled for hours at a time. The reviews aren't great.

Any other suggestions other than buying a fridge for upstairs? (there isn't any room for a mini fridge up here)