Cute water bottle

Where can I buy a water bottle that keeps my water really cold throughout the day? Im in karachi so if its in-store it should be in karachi otherwise I would prefer it to be an online shop. I do not want a stanley but I would like an owala or a hydroflask but I don't care too much about the brand so if there is some local cute brand with high quality bottles that would be alright. I don't wanna spend thousands on a bottle though, so no more than a 5000 rupee budget.