Baby Einstein Opus's Stack & Stream Cups
The Baby Einstein Opus's Stack & Stream Cups comes with 5 pieces, per Baby Einstein. Four nesting cups and a purple water squirter, with an octopus cup that the maker says changes color in warm water.
- 3 to 36 monthsAge
- 5Pieces
- 100% plasticMaterial
- NoneBatteries
How the Opus's Stack & Stream Cups stacks up
Against the 16 stacking and nesting toys we track. The shaded band is where the middle half of them fall; the dot is this one.
Within the typical range for stacking and nesting toys (5 to 8).
Within the typical range for stacking and nesting toys ($12.99 to $19.99).
What sets the Opus's Stack & Stream Cups apart
Measured against the 16 stacking and nesting toys we compare, from each maker's published specs.
Next to its closest matches
- Infantino Squeeze & Stack Block SetNext to it, the Opus's Stack & Stream Cups is 3 fewer pieces.
Next to other stacking toys
This toy's values are as Baby Einstein lists them. The right column covers the other 15 stacking toys on this site.
| Spec | This one | Others here |
|---|---|---|
| Age label | 3 to 36 months | Labels start from birth to 12 months |
| Pieces | 5 | 5 to 10 listed |
| Needs batteries | No | 1 of the 5 that list it need batteries |
More from Baby Einstein
| Care | Wipes clean |
|---|
Listed features
- Labeled Regular price and MSRP $12.99
- The maker says no batteries are needed
- Five pieces: 4 cups and 1 squirter
Worth checking
- Page spells the name two ways (Opuss and Opus's)
- No warnings or material details beyond '100% plastic'
Where to buy the Opus's Stack & Stream Cups
Prices and availability change. We may earn a commission from some links.
- Check for recalls: Search the agency's recall list with the model number and date code from the label: CPSC recall search.
- Use and supervision: follow the maker's warnings on the product, and see CPSC's Safe Nursery guide. Check the label and the maker's instructions, and ask your pediatrician about your child.
Full specs
| Baby Einstein Opus's Stack & Stream Cups | |
|---|---|
| Type | Stacking or nesting toy |
| List price | $12.99 |
| Age label (maker) | 3 to 36 months |
| Pieces | 5 |
| Material | 100% plastic |
| Size | 6.0 in (H) x 3.48 in (W) x 4.1 in (L) |
| Batteries | None |
| Care | Wipes clean |
More stacking
- Baby EinsteinStack & Teethe$95 pieces$9.99
- Bright StartsKaleidoCubes Stack & Squeeze Blocks$12$12.99
- InfantinoSqueeze & Stack Block Set$118 pieces$11.49
- PearheadWooden Stacking Toy$14$14.99
- Fisher-PriceRock-a-Stack
- Green ToysMy First Stacking Cups6 pieces
- SassyStacks of Circles Ring Stacker
- MushieStacking Cups Toy8 pieces
Opus's Stack & Stream Cups: questions answered
From Baby Einstein's published specs, last checked 2026-11-11.
What age is the Baby Einstein Opus's Stack & Stream Cups for?
The maker labels it "3 to 36 months". Use and supervision: follow the maker's warnings on the product, and see CPSC's Safe Nursery guide. Check the label and the maker's instructions, and ask your pediatrician about your child.
How do I clean the Baby Einstein Opus's Stack & Stream Cups?
Per the maker: Wipes clean.
Still wondering? Write to us at hello@cribpicks.com and we'll look it up.
Where these specs come from
Last checked 2026-11-11. Spot something wrong? Tell us. Read our editorial and safety policy and corrections.