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Customer reviews for Zak Designs 16-oz Stainless Steel Double-Wall Tumbler for Kids with Straw, 2-Piece Set for
Zak Designs 16-oz Stainless Steel Double-Wall Tumbler for Kids with Straw, 2-Piece Set
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4.8 out of 5 stars
stars
133 ratings52 reviews
  1. 5 stars89% (119)
  2. 4 stars6% (8)
  3. 3 stars3% (4)
  4. 2 stars1% (1)
  5. 1 star1% (1)

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Showing 51-52 of 52 reviews
Jan 4, 2026
Reviewer name: SHERL
1 out of 5 stars
1 out of 5 stars review

I do not at all like the fact that there is a ball of lead in the base of these tumblers and that it could possibly dislodge and cause permanent damage to our children possibly death

Helpful?6G9IT5PH3MDF17880070689
reply from Zak Designs Customer Support

All of the accessible components of Zak Designs’ products are lead free.  We utilize 3rd party international testing laboratories to verify the lead-free status of our products.

Jan 16, 2026
Reviewer name: Sara
2 out of 5 stars
2 out of 5 stars review

Not Leak-Proof

These are 100% not leakproof. I wanted them to be so bad! Ugh still on the hunt for a non-leak proof water bottle! They are very cute though.

Helpful?6G9IT5PH3MDF17880070689
reply from Zak Designs Customer Support

On behalf of the zak! family, we’re sorry that you weren’t 100% satisfied with this product. Please reach out to our amazing Customer Care Team at customerservice@zak.com , and we will do everything we can to remedy this for you.