There are quite a few inventions that were so good when they were created they haven’t required many changes over the years. Wheels. Toilets. Mousetraps. Paperclips. Door knobs. And yes, these Japanese Stackable Tumblers from Toyo Sasaki. Made in Japan from reinforced soda-lime glass, these classy tumblers were first produced in the early 70s by a company founded during the Meiji era. They’re durable. They’re simple. They’re stylish. They even stack together easily to take up less space in the cabinet. And since they come in a six pack, you’ll have enough to enjoy a glass of the good stuff with friends or family. Despite the fact that the design hasn’t been updated in ages, modern cleaning technology has been–cleanup is easier than ever because these are dishwasher safe.