docweathers Posted December 25, 2015 Report Share Posted December 25, 2015 Like most of us, I have a number of cool looking ceramic cups. But, I never actually use them because my coffee cools so much faster in them than in double walled insulating plastic cups. My question is, has anyone figured out how to insert an insulating plastic liner into a ceramic cup? Or is there a better way to insulate them?. Link to comment Share on other sites More sharing options...
alabama Posted December 25, 2015 Report Share Posted December 25, 2015 My avatar is a double walled cup I made for a relative. Its made from 3 lbs. Center, cone, cake, divide, throw center first, throw exterior of then join the two just below the neck, and made a vent hole to allow air to escape while shrinking. Trim and add handle. Its a copy of a 1684 cup. Talking about finding your own style from an earlier post, this British potter wanted a style different from everyone else. Around the 1680s this potter decided that his pottery should be so distinct that it could be recognized from across the room. So most, if not all were double walled with pierce-work on the outside. That included cups, steins, bowls, and pitchers! If there's another method of insulating, I haven't seen one. See ya, Alabamà Link to comment Share on other sites More sharing options...
docweathers Posted December 25, 2015 Author Report Share Posted December 25, 2015 At 3 lbs, one could get your daily workout drinking your coffee. How well does it insulate? Link to comment Share on other sites More sharing options...
PRankin Posted December 25, 2015 Report Share Posted December 25, 2015 I never realized that was a double walled cup as the pic is so small on my iPad. Now that I've enlarged it it is something really special. Double walls has been on my project to-do list for a long time so now I'll really have to try that. Link to comment Share on other sites More sharing options...
Joseph Fireborn Posted December 25, 2015 Report Share Posted December 25, 2015 This person from the Netherlands sells double walled cups: https://www.etsy.com/listing/117433297/modern-quality-facetted-porcelain-thermo?ga_order=most_relevant&ga_search_type=all&ga_view_type=gallery&ga_search_query=double%20walled%20ceramic%20cup&ref=sr_gallery_11 Seems to have good reviews. Link to comment Share on other sites More sharing options...
docweathers Posted December 25, 2015 Author Report Share Posted December 25, 2015 The Netherlands cups are very nice looking. I wonder how well they insulate. To find out I will have to make one. Link to comment Share on other sites More sharing options...
Marcia Selsor Posted December 25, 2015 Report Share Posted December 25, 2015 I always thought ceramic cups or mugs stay much warmer than other materials. The Chinese tea bowl designs for winter (keep it warm) and summer (let it cool) were respectively shaped |__| \__/ same goes for cream based soup bowls (low) \________/ and broth based soup bowls. {____} Form follows functions came from these types of uses. Marcia Link to comment Share on other sites More sharing options...
ronfire Posted December 25, 2015 Report Share Posted December 25, 2015 just preheat the mug first Link to comment Share on other sites More sharing options...
Mark C. Posted December 25, 2015 Report Share Posted December 25, 2015 Those ones in the link have two slipped cups joined at top Larry you could throw two and join them at rim. I just pour boiling water in my am coffee cup ( porcelain which is denser than stoneware) seems to work fine The other trick to hot coffee is drink it while it's hot and use the right size mugs so that happens I get lots of mug feedback from customers and hot fluids is one that works well Link to comment Share on other sites More sharing options...
Callie Beller Diesel Posted December 25, 2015 Report Share Posted December 25, 2015 In the Lark books "500 cups" there are 2 examples from Chuck McGee that he calls "coolies" that are double walled construction (pgs 309 & 328.). He is part of the Tampa pottery tour, but that was all the internet presence I could find on him in a 3 minute Google search that didn't include Facebook. They are wood fired and *very* nice examples. They seem to be a size that I would get out of about a pound of clay, if it were thrown in the normal way. I suspect from a couple of the making marks that he used the method Mark suggests above. Edit: forgive the horrible pictures. The distortion around the wadding marks on the second cup makes me think he's thrown these very thin indeed to keep the weight down. Link to comment Share on other sites More sharing options...
Pres Posted December 25, 2015 Report Share Posted December 25, 2015 I just sold a bunch of coffee mugs to a local restaurant. They wanted some fancy mugs for on the counter that were larger. They had some commercial mugs that were wide tops, narrow bases that held about 14-16 oz. They chipped a lot. When they started using mine, they found they stayed hot a lot longer, held 14-22 oz. and didn't chip as easily. I made mine with larger bellies and narrow tops with slightly thicker bases completely flat. This way to hold the heat, and hold a large cup that did not need filling so often. I think stoneware works better at this than some other clays. best, Pres Link to comment Share on other sites More sharing options...
Joseph Fireborn Posted December 25, 2015 Report Share Posted December 25, 2015 I just sold a bunch of coffee mugs to a local restaurant. They wanted some fancy mugs for on the counter that were larger. They had some commercial mugs that were wide tops, narrow bases that held about 14-16 oz. They chipped a lot. When they started using mine, they found they stayed hot a lot longer, held 14-22 oz. and didn't chip as easily. I made mine with larger bellies and narrow tops with slightly thicker bases completely flat. This way to hold the heat, and hold a large cup that did not need filling so often. I think stoneware works better at this than some other clays. best, Pres I made my wife several coffee mugs, and she only drinks out of mine now. It isn't the aesthetic of them that she likes, but the fact that they keep the coffee hotter and the mug doesn't get hot to the touch. Compared to her commercial mugs that she had, which got cold much faster. She prefers the mugs I made to the plastic double layered cups called "tervis". She said that the coffee stays hot longer in my mugs cause it heats the mug up, but not to hot that you can't handle it. I don't drink coffee so I can't comment on this fact. I thought at first she was just being nice, but then I remembered my wife is very blunt about my mishaps. I bring in new experimental stuff all the time and shes like, "umm... no.." Link to comment Share on other sites More sharing options...
GiselleNo5 Posted December 26, 2015 Report Share Posted December 26, 2015 Joseph: This made me smile! What a wonderful compliment that she uses only your mugs. And at least you know she's really being honest!! Link to comment Share on other sites More sharing options...
Marcia Selsor Posted December 26, 2015 Report Share Posted December 26, 2015 I think Mark and Pres bring up good points about the right size mug as well as shape. I don't think really large coffee mugs will stay warm while you drink the entire contents. Who needs a 24 oz coffee mug? I even thing 16 oz is too much but I drink espresso. My husband drinks double shots of espresso in cups that I made for him. They are still warm when he finishes. I drink cappuccino with a larger cup and it stays warm. Maybe it depends on the habits of the consumer. Marcia Link to comment Share on other sites More sharing options...
flowerdry Posted December 26, 2015 Report Share Posted December 26, 2015 I travelled a lot for work and used the plastic insulted cups all the time. One of the joys of being retired, for me, is being able to use ceramic coffee cups at home. I use slightly smaller ones 10-12 oz and my coffee stays warm until I'm done. I'm having trouble imagining a cup made with 3 lbs of clay. For me, it might be too heavy to use. Link to comment Share on other sites More sharing options...
Mark C. Posted December 26, 2015 Report Share Posted December 26, 2015 Remember that was a wet 3# of clay not a fired weight for that double wall mug he spoke about. I,m drinking hot coffee right now . I pre heated the mug with boiling water and used a ceramic cone dripped into the hot mug This mug is a rather large one and it will keep all the coffee hot until empty. It's almost to hot to drink for the 1st half cup. I use a metal doulbe insulated cup while traveling on the road for shows as driving slows coffee intake and it does keep it hot longer for sipping. Link to comment Share on other sites More sharing options...
flowerdry Posted December 26, 2015 Report Share Posted December 26, 2015 I just went and weighed a mug that I made out of stoneware, fired to cone 6 using about 1 lb of clay. It was trimmed a little. Finished, with a handle added, it weighs 12 oz, so 3/4 it's wet clay weight. So 3 lbs of clay would still be over 2 lbs finished weight, plus/ minus some ounces since we don't know how much was trimmed and what weight the handle was. I just had some fun weighing various mugs. My heaviest, one I made and one I didn't, weigh 1 lb 4 oz. The others that I consider my heavy ones are 1 lb. Most are 12 to 14 oz. Interestingly, the 1 lb'ers includes one that I'm not selling because to my sensibility, it's heavier than it should be based on size and form. I have asked a couple of people about this mug, and they said they weren't bothered by the weight, but I am, so it's in my cupboard, and honestly I will probably pitch it because I hate using it. So maybe I'm more sensitive than others to the weight issue. If a mug doesn't weigh what it looks like it should, then my reject button gets pushed. And, maybe heavier mugs appeal more to men? Link to comment Share on other sites More sharing options...
PeterH Posted December 27, 2015 Report Share Posted December 27, 2015 You might also consider trying a lid. Heat loss from a styrofoam cup is certainly reduced: http://www.madsci.org/posts/archives/2004-11/1100284491.Ph.1.jpg ... figure from http://www.madsci.org/posts/archives/2004-11/1100284491.Ph.r.html Link to comment Share on other sites More sharing options...
docweathers Posted December 27, 2015 Author Report Share Posted December 27, 2015 I am glad science is able to answer interesting and relevant questions Link to comment Share on other sites More sharing options...
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