Summit 水壺附吸管蓋

My son's school lunch stays cold all morning thanks to the double-walled insulation. The straw lid is totally leak-proof in his backpack, which was my biggest worry.

I was skeptical about the leak-proof claim, but this straw lid really hasn't leaked once in my son's backpack. The double-wall insulation keeps his water ice-cold even after hours at school.

My kid drinks way more water now that the straw lid is so easy to flip open, and I love that it's actually leak-proof when closed. The vacuum insulation really does the job too—ice was still clinking around after a full school day.