We pulled round two from the deep freeze and drank straight from the bottles.Īt home, I ran tests. Anticipating this, we had stashed a couple of beers in the freezer at the beginning of our session. The Rabbits had to be cooled down again before the next round.
In practical terms, however, it meant that in the 20 minutes that we sipped down our 12 ounces of room-temperature beer, it went from a bit too warm, to just right, to a bit too cold, to gone. What that means, dear imbiber, is that a wall of ice around your drink pulls a lot of heat out of your beer as it goes through that heat-sucking phase change on its way to becoming liquid. The important part, though, is that if it goes through the state change from ice to water, you suddenly need 144 BTUs. A pound of ice, on the other hand, needs to absorb only 0.5 BTUs to raise it a degree. Pointing to a chart on page 3, he explained a BTU (British thermal unit)-the amount of heat needed to raise one pound of water one degree Fahrenheit. Ben pulled out a copy of Nigel Calder's Refrigeration for Pleasureboats, an industry bible nearly as popular aboard ocean-going vessels as Jimmy Buffett CDs, and reminded me that refrigeration isn't about making things cold, it's about removing heat. We poured a couple of room-temperature Hale's Mongoose IPAs as Ben, a boat refrigeration specialist, started telling me about BTUs, heat transfer and why the would make the liquid inside it cooler. There's also a black silicone sleeve around the bottom that makes them sound like a plastic cups when you clink glasses.įirst up were Rabbit's Freezable Beverage Glasses ($35 for two). Those walls encase a water-and-alcohol "chilling liquid" and a fair amount of air, creating the wiggle room to accommodate the state change from water to ice. Like old-school Pyrex, the Rabbit glasses are made of double-walled borosilicate glass. meter and he likes drinking a cold one out of either a glass with a picture of Do Ho on the side or a thick-walled goblet that reads "Beer Drinkers Are Better Lovers."* I wanted to include Ben in my testing because he's got a fine-tuned B.S. I texted my brother-in-law Ben to let him know it was beer and cribbage night. Existing technology-refrigerators for beer, ice cubes for whiskey-already do this, and a question leapt to mind: What problem do these glasses solve? As far as I can tell, the answer is "none." Rabbit, manufacturers of a well-known corkscrew, had introduced freezable beer and whiskey glasses designed to cool your drink and/or keep it chilly. Flipping toward the crossword in the Sunday paper not long before Christmas, an ad for some puzzling-looking glasses caught my eye.
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