If you love your Stanley tumbler, I'm right there with you. They really do keep my water at an optimal temperature for so long—even ice stays frozen. There's just one problem: leaks from the straw.
Serious Eats on MSN
I popped out dozens of ice cubes to find the 3 best ice cube trays
I tested silicone and plastic trays to find the best ones for perfect ice cubes (and spheres!).
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