Thyseed Weighted Straw Sippy Cup
Best for: Best transition sippy cup — weighted straw works at any angle, soft silicone spout mimics bottle nipple. Spill-proof, BPA-free PPSU. Easy-grip curved handles. 4.6★ with 81% five-star.
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TidyHacks verdict
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Our review
If your baby refuses bottles or is struggling to transition from breast to cup, this Thyseed sippy cup may be the answer. The soft silicone spout mimics the feel of a bottle nipple, and the weighted straw follows the liquid to any angle — upright, tilted, or lying down.
The design is genuinely clever. The one-piece molded weighted straw (no separate parts to lose or trap bacteria) has a ball at the end that drops to wherever the liquid pools, so baby can drink in any position. The soft spout feels familiar to bottle-fed babies, making the transition natural. The curved handles are sized for small hands to grip.
The wide-neck PPSU construction makes cleaning easy — you can see inside and reach all surfaces. BPA-free, sterilisable, and spill-proof. Includes a thin brush for cleaning the straw. 10 oz capacity.
The downsides: at $28, it is expensive for a sippy cup. Some reviewers report leaking (though most say it is spill-proof). The lid can be slightly hard to open. And with only 344 reviews, it has less social proof than established brands. But the reviews are overwhelmingly positive (81% five-star), and multiple parents specifically credit this cup with ending months-long bottle refusal.
👍 Pros
- Weighted straw works at any angle — even lying down
- Soft spout mimics bottle nipple — easy transition
- One-piece molded straw — no bacteria traps
- Wide neck PPSU — easy to clean and see inside
- BPA-free, sterilisable
- Spill-proof design — no leaks for most users
- Easy-grip curved handles for small hands
- 81% five-star — parents love it
👎 Cons
- $28 — expensive for a sippy cup
- Some report leaking (not universally spill-proof)
- Lid can be slightly hard to open
- 344 reviews — less social proof than bigger brands
- Straw brush needed for thorough cleaning
Specifications
| Type | Weighted straw transition sippy cup |
|---|---|
| Material | PPSU body, silicone spout and straw |
| Capacity | 10 oz |
| Age | 6+ months |
| Features | Weighted straw, soft spout, curved handles, spill-proof |
| BPA-free | Yes |
| Includes | Cup + straw cleaning brush |
| Brand | Thyseed |
FAQ
Does the weighted straw really work at all angles?
Yes — the weighted ball at the end of the straw drops to wherever the liquid pools, allowing baby to drink upright, tilted, or lying down. Multiple parents confirm it works in every position.
Will it help with bottle refusal?
Multiple reviewers specifically bought this after months of bottle refusal. The soft silicone spout feels similar to a bottle nipple, which helps babies make the transition naturally.
Is it truly spill-proof?
Most reviewers report no leaks. A few have experienced leaking, which may be due to not closing the lid fully. Ensure the seal is properly seated.
How do you clean the straw?
A thin cleaning brush is included specifically for the straw. The wide-neck cup body is easy to clean by hand or in a steriliser.
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