(Image credit: Tom's Guide) The Coffee Lab (Image credit: Tom's Guide) I'm Erin, and welcome to the ninth episode of The Coffee Lab , the series where we forget coffee snobbery. The Coffee Lab is all about making coffee fun. Join me as I help you kickstart your coffee journey! You've been asking, and I've been listening — you are sick of plastic in your coffee makers. Coffee lovers desperately want a plastic-free coffee machine. The plastic-free SimplyGoodCoffee Brewer is your answer if you want a drip machine, and the AeroPress Premium is a glass-and-metal manual gadget. The SimplyGoodCoffee Brewer has arrived at The Coffee Lab — it's due on the dissection table as soon as possible — and I'm super excited to get testing. But you want plastic-free coffee makers now ... so, please, let me introduce you to the Ratio Four. The Ratio Four is a delightful coffee maker. There's nothing else quite like it.…