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Cradle Score
Sippy & straw cups

b.box Sippy Cup with Weighted Straw

About $12Checked Oct 17, 20262 sources

Our take

A weighted straw lets babies drink even when they tip the cup back, and it was fully spill-proof in testing. Straws are replaceable. The sealed silicone ring is hard to clean thoroughly.

Weighted strawBPA, PVC & phthalate freeFlip top

Consider instead: Thermos FUNtainer for an insulated straw cup.

Before you buy

Do you need it?Later Offer water in a cup with meals from around 6 months, and aim to move off bottles between 12 and 18 months.
Cost per monthAbout $0.67 a month over a typical 18 months of use. Our estimate; your use may be shorter or longer.
Cheaper optionDr. Brown's Milestones Cheers 360 Cup: About $6-9, scored 78 (Good).
Secondhand?Buy new. Buy new; valves and straws wear out.
TipStraw and open cups are easier on developing mouths than hard spouts.

What parents and testers say

Recurring praise

  • Drinks at any angle
  • Spill-proof in testing
  • Replacement straws available

Recurring complaints

  • Hard-to-clean seal
  • Brush and spare straws cost extra

Our summary of patterns across the reviews and threads linked below, not quotes.

Materials & safety check

2 of 3 checks clear, 1 to know about.

MaterialPlastic free of BPA, phthalates and PVC; silicone straw
CleaningUse a straw brush; the inner seal can't be fully removed
RecallsNone found for b.box in CPSC cup recalls

When to buy it

Registry

Optional

~6 months

Offer water in a cup at meals as solids start

12-18 months

Aim to finish with bottles

Other sippy & straw cups we scored

See all sippy & straw cups →
84+7 pts

Pura Kiki Vacuum Insulated Toddler Sippy Cup

About $40 · Good

79+2 pts

Thermos FUNtainer Insulated Straw Bottle

About $19 · Good

78+1 pts

Munchkin Miracle 360 Trainer Cup

About $13 for 2 · Good

Own this? Tell us how it's going

Reports from parents who've used a product for months are the hardest thing to find. Yours goes only to our team and helps keep this score honest. It isn't published.

How do you feel about it?

Common questions

Is the b.box Sippy Cup with Weighted Straw non-toxic?

There's no legal definition of "non-toxic" for baby products, so here's what we checked. Material: Plastic free of BPA, phthalates and PVC; silicone straw. Cleaning: Use a straw brush; the inner seal can't be fully removed. Recalls: None found for b.box in CPSC cup recalls. It scores 78 out of 100 on materials and safety, and 77 overall.

Not sure what a label means? See baby product labels, explained.

Sources

  1. Mommyhood101: Best sippy cups of 2026, testedmommyhood101.com
  2. CPSC recall database: "cup" recalls since 2020saferproducts.gov
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