Amazon has Contigo Kids Tumbler for $14.90, which is 31% off its original price of $21.59.

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Product Description: A BPA-free, spill-proof tumbler designed for kids with a fun and colorful design. Ideal for ages 3 and up.

• Leak-proof and spill-proof with a secure straw valve
• BPA-free and dishwasher safe
• Soft grip bottom prevents tipping