航海家隨行杯（附透明翻蓋及吸管）

Filled it with iced coffee at 7am and by 3pm there were still chunks of ice floating around, so the double-wall vacuum insulation is no joke. The flip lid twists on securely and the straws are a nice touch, though I mostly drink straight from the rim. Fits my car's cupholder perfectly, which was a p

I was worried the lid might leak in my bag, but it's completely twist-on secure and the straw flips up easily. Keeps my iced coffee cold for hours without any condensation on the outside.

Drinking coffee one-handed during my commute is finally possible thanks to the twist-on, leak-proof flip lid. The vacuum insulation keeps it piping hot for well over an hour, and having a spare straw is a thoughtful touch.