The Simple Modern Trek Tumbler also seems to do a better job of keeping drinks cold as it has a tall and slim design compared to Stanley‘s wider cup. "The Simple Modern Trek Tumbler is double ...
Full video : <a href="https://youtu.be/vNmdZ_uaq4U">https://youtu.be/vNmdZ_uaq4U</a> materials I used : Soft copper wire : 20 gauge ( wire diameter 0.8mm ) : 20cm ( 8 ...