ISO help to remove smell from container....
I have a stainless steel insulated tumbler...got it for a whopping $25 at Starbucks. For me, that's alot to spend on something like that, but I realllly liked it. Well, I made an oopsie and left coffee in it for like a week, and needless to say, it smells really really really bad. Therefore, put vinegar water in it for a few days, thinking that would help it...nopers, it didn't help. It looks clean on the inside, but it still smells; therefore I deem it unsafe to drink from.
Any suggestions on how to really clean this stinker?