Traveler pink topaz 16 ounce Swell water bottle

Swell has thermos feel technology which vacuum seal that there’s not only stainless steel but there is a layer of copper which keeps drink cold for 24+ hoursAnd hot or 12 for making sure the exterior stays dry. The white now easily allows for ice to be put in a straw etc. I had thyroid cancer and this was the best brand of bottles I found they keep the drinks the coldest colder than other popular brands there like triple insulated I call them