It hasn't changed because there's no need to.

As the weather warms, you start hearing "A beer, please!" more often in bars. While the same beer tastes great in summer, there's a sense of urgency, as if you're compelled to drink it all down quickly. But in early spring, there's a subtle difference; you feel inclined to pour it into a glass and savor it slowly. In this mood, sipping a bottled beer bit by bit feels more spring-like and refined than drinking draft beer from a mug. It was while enjoying this slow sipping that the theme for this piece came to me.

This tumbler, found in izakayas and teishoku restaurants across the country, always serves beer. How long has it been the same design?! I'd never really considered its existence before, let alone pondered its design. Yet, I distinctly remember it always being present at adult gatherings since I was a child.

What if everyone needs a product, but no one gives its design a second thought, considering it "just the way it is" and not desiring any improvements? Naturally, that product's design would be passed down unchanged. In a way, this is the "ultimate standard." I'm not sure if it's appropriate to arrive at the "ultimate" while drinking beer, but there's no doubt this tumbler is more significant than it appears.

The "Purity" of Giving Form to the Obvious

As I mentioned in the second installment of this series, design is form born from constraints. Applying this to the tumbler, it means an optimal shape created under constraints such as "must not break easily," "just the right size for pouring beer," and "inexpensive." Specifically, the rim is slightly thicker for added strength, it's made of thick tempered glass (though not perfectly clear), and unnecessary curves have been eliminated to allow for stacking...

While it might be the obvious outcome when you think about it, I believe this "purity" is crucial in product design. If a designer's ego, wanting to "leave their mark," had interfered, this tumbler would likely not have endured for so long.

Incidentally, the tumbler's capacity was about 170ml when filled to the brim. Is this because it's the optimal volume for drinking beer, or is it a conspiracy in the restaurant industry, appearing to be a standard 180ml serving but actually being slightly less? I'm tempted to investigate further, as it sounds like fun.