THIS IS NOT INVENTED BY ME. THIS IS INVENTED BY MARK MANGER. I HIGHLY RECOMMEND TO VISIT GROPENER WEBSITE: " https://www.gropener.com/ ". THERE YOU CAN BUY THE ORIGINAL BOTTLE OPENER MADE IN ALUMINUM. <<< GrOpener is the creation of Mark Manger, an Applied Artist from Denver, Colorado. Inspired by the stick & screw openers Mark encountered in Africa in the 1990?s, the GrOpener uses the same leverage principle, but in a form that allows a bottle to be opened through the act of grabbing it. <<< This is super easy to print! Project video in Finnish (UPDATE: SUBTITLES IN ENGLISH): https://www.youtube.com/watch?v=gM_iu6JYxDA PRINT WITH SUPPORT MATERIAL (there is a little overhang!) My first ever 3D creation! Version 4 (updated 23.6.14): Now there is 4 different editions: Magnets from dx.com (here is a link: http://www.dx.com/p/10050078w-round-ndfeb-magnets-silver-50-pcs-239991) Coin is a 1cent euro coin. You will also need some super glue if you are printing edition 2,3 or 4. All editions are right scaled and tested. At the slicing software rotation of the object is only required. I recommend to print with 100% infill (layer height 0.2mm) but my 20% infill opener is also tough enough to open a bottle! My prints are made of PLA, PLA/PHA and XT plastics! I like to see your prints of this model! visit: https://www.youmagine.com/designs/smart-one-handed-bottle-opener-by-kart5aPrinting tips: Print always with support touching build plate! (There is a little overhang). I prefer to print this model with 100% infill. Material: This model works well with many of plastics. I have tried PLA, Colorfabb PLA/PHA and Colorfabb XT (copolyester). ABS should work well as well but it might be a little too flexible (a part of the opening force goes to flexing so the opening process requires more force). I think PLA is awesome material to choose for this print! Steps: TIP: Glue the coin as well as possible. The product has to be very solid. It won't break unless it is not solid enough. (I have printed so many of these and only one broke up caused by bad gluing.