コールマンのマグカップ

情報源: ダブルステンレスマグ 300|キャンプ用品やアウトドアならコールマンオンラインショップ

これの旧型を持っているのだが、保温性能がイマイチ。
Amazonのレヴューを見てみると、真空断熱じゃなくて、中空構造らしい。

確かに熱湯を入れると外側まですぐに暖かくなり、熱が逃げやすい事は実経験で分かっていたのだが、買った時には、まさか中空構造などという余り断熱効果が高くないものが存在するとは夢にも思って無かった。

まあ、紙コップ二重に重ねて、「二重構造で冷めにくい」と言っても嘘ではないから、この手の製品の場合、「真空断熱」と書いていない限り、中空だと思っておいた方が良いのだろう。

という訳で保温性能が良いマグカップをこうにう。

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