Thyseed PPSU Weighted Straw Cup with Handles - SpillProof Transition

In this review the Thyseed PPSU Weighted Straw Cup with Handles is presented as a practical transition cup for babies 6+ months who are moving from bottle to cup. The single biggest reason to buy is its weighted straw and V-valve design that let infants sip easily in any direction while preventing sprays and leaks during normal use. The reviewer found the soft silicone spout gentle on gums, the gravity ball straw effective at keeping liquid available without tipping, and the PPSU material reassuringly durable and flavor-free for everyday milk and water.

Key Features

• V-valve design: Automatic opening provides a self-adjusting flow that keeps sips smooth and reduces the chance of choking or spraying.
• Gravity ball straw technology: The weighted straw allows easy sipping at any angle so babies can drink while lying back or leaning forward.
• Premium materials: Made from Germany BASF PPSU and WACKER silicone for a flavor-free, BPA and phthalate-free cup that resists staining and odors.
• Easy to clean: Wide neck and only four parts make hand washing straightforward and the cup is top-rack dishwasher and sterilizer safe.
• Bite-resistant spout: The soft silicone spout is gentle on teeth yet durable enough to withstand regular biting and chewing.

Who It's For

The Thyseed weighted straw cup is best for parents of babies and toddlers around 6 months and older who are transitioning from bottle feeding to an independent cup, especially those who want a no-spray solution and an easy-to-sip straw for reclining or moving infants. It suits breastfed babies who may need a gentle, natural-feel spout and families that prioritize dishwasher-safe and sterilizer-safe feeding gear.

Parents looking for a very low-cost disposable cup or a traditional open cup might look elsewhere; this product is more targeted at learners who need a spill-resistant design and a weighted straw to maintain flow when tipped. If a model with a rigid spout or non-weighted straw is required, other cup types will be more suitable.

Pros & Cons

Pros

• Well-designed weighted straw and V-valve deliver consistent, easy flow and reduce leaks when used correctly.
• High-quality PPSU plastic and WACKER silicone feel flavor-free and durable compared with common plastics.
• Wide neck and simple four-part construction make cleaning and assembly quick, with a straw brush included.

Cons

• Some customers report leaking in certain conditions, so careful assembly and valve placement are required to avoid issues.
• As a more premium-material cup, it is pricier than basic learner cups, so value perceptions vary among buyers.

Specifications

Brand	thyseed
Material	Germany BASF PPSU cup, WACKER silicone spout
Capacity	10oz / 300mL
Age Range	6+ months
Design Features	V-valve automatic opening, gravity ball weighted straw
Cleaning	Top-rack dishwasher safe, electric sterilizer and boiling water safe

Our Verdict

The Thyseed PPSU Weighted Straw Cup is a strong choice for parents who want a spill-resistant, easy-sip transition cup made from higher-end materials. It combines a weighted straw and V-valve to ease the bottle-to-cup transition, and its bite-resistant silicone and easy-clean design make it a practical longer-term option despite mixed views on value and occasional reports of leakage when not assembled precisely.

Frequently Asked Questions

Is this cup safe for bottles and milk?
The cup is made from PPSU and WACKER silicone, both free of BPA, PVC and phthalates, and is intended for milk and water at typical baby temperatures.

Can it be sterilized?
Yes, it is safe for top-rack dishwasher use, electric sterilizers, and boiling water according to the product description.

Does the straw work when tipped?
The gravity ball straw is designed to allow sipping at any angle, helping babies drink while lying back or moving the cup around.