Drinking from a stainless steel bottle is definitely the more sustainable and wiser way to go, but have you ever noticed that something is just a bit off after taking a drink? Does cold water have a little metallic aftertaste? That is why we created our Puramic™ Aqualina Tumbler. Once you use this ceramic-lined, insulated tumbler, you won't be able to use a regular stainless steel tumbler again.