Spike Insulated TumblerTypical with our engineering team, this tumbler was put through its paces before going on our site. It's guaranteed to keep your coffee hot in the morning and beer cold at night (or flipped around if you're really getting after it). Also the bottom has a little surprise which is a throwback to our namesake. But you'll have to buy one to see for yourself. Specs: 304 stainless steel Double wall vacuum insulated 7" tall x 3. 5" wide (at the top) and 2.