As a general rule, though, it’s safe to call a plastic cup with a straw a tumbler and a metal mug with a press-on lid a travel mug Most people use these terms interchangeably, so no worries if you mix them up! What are steel cups called? Tumbler cups are traditionally used for cold drinks … Read more
Is it insulated? The starbucks stainless steel tumbler has a double-walls of stainless steel 18-8 to keep your drinks hot or cold for hours. This is possible because of the tumbler is vacuum insulated, which is responsible for the temperature retention. What metal are tumblers made of? Rarely seen for drinkware. Basically, cheap stainless steel … Read more
If ceramics are baked for long enough at hot enough temperatures, they may still be safe, but if not, the lead can leach into food and cause lead poisoning Acidic food or drink is especially likely to cause lead to leach out of ceramics, unfortunately for coffee drinkers with favorite earthenware mugs. Are pottery mugs … Read more