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Do Double Wall Plastic Tumblers Sweat? What the Air Gap Really Does to Condensation and Ice (Video)

This 60-second video sums up the buying guide. The full article covers the details and sources.

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Video transcript

  1. 0:00Do double-wall plastic tumblers sweat? Mostly no. Here's why.
  2. 0:05Sweat forms on surfaces colder than the air's dew point. Single walls run drink-cold and bead. Here the air gap takes the drop, so the shell stays near room temperature.
  3. 0:18In humid heat, light sweat can still form. The fused rim has no air layer, so beads start below the lip. Packed ice, lid drip and overfilling add more.
  4. 0:30Water inside the wall means a failed seal. A tiny crack plus heat cycles acts like a pump, pulling in moisture that fogs when chilled. Avoid hot washes and soaking.
  5. 0:43Test samples first: same fills with headspace, on dry paper towels, beside a single-wall cup. Then soak warm, refill with ice water, and check the gap against light.
  6. 0:55Built for one session. Send your event date, quantity and artwork.

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