Drinking guide
Sippy cup vs straw cup vs open cup: which one, and when
Every cup aisle offers the same three choices with none of the context: sealed spout cups that promise clean floors, straw cups, and plain open cups. They are not interchangeable. Each one asks something different of your baby's mouth, and the order you use them in changes how fast drinking skills arrive. Here is the honest comparison.
The three cups, side by side
| Sippy cup (sealed spout) | Straw cup | Open cup | |
|---|---|---|---|
| What it teaches | Little; the valve does the work | Straw drinking: lip seal, tongue control | The full skill: sipping, pacing, cup control |
| Mess | Minimal | Low with a lid on | Real; pour small and supervise |
| Start around | Optional, from 6 months | 6 months | 6 months, supervised |
| Best for | Car, stroller, backup | Daily cup on the go | Meals at the table |
| Olababy option | Soft sippy spout lid in the Transitional Set | 5oz Training Cup with Lid + Straw | First Cup (2oz), Silicone Training Cup |
What each cup actually asks of your baby
A sealed spout cup opens when your baby bites or presses the valve and tips the cup back. Mechanically, that is close to a bottle, which is exactly why it is easy to accept and why it teaches so little. The floor stays clean because the cup is doing the drinking.
A straw cup makes your baby draw liquid upward: lips sealed, cheeks working, tongue back. That is real oral motor practice, and most babies can learn it around 6 months with a soft, short straw.
An open cup asks for everything at once: lift, tilt, sip, pace, put it down. It is the messiest option and the whole point. Open cup and straw practice asks a child to control the flow themselves, which a sealed cup does not, and the skills transfer to every cup your child will ever hold.
360 cups vs open cups vs straw cups
A 360 or spoutless cup seals around the entire rim and releases liquid when a child presses their lips against the edge, anywhere on the circle. It looks like open cup drinking and it keeps floors clean, which is a fair reason to own one.
The honest caveat is the same one that applies to valve spouts: the seal does the spill prevention, so the cup still manages the hard part. That is why some feeding professionals prefer plain open cups and straws as the everyday teaching tools, with a sealed cup kept for outings. In the Olababy lineup, the open Silicone Training Cup covers rim drinking and the 5oz straw cup covers straws; there is no 360 cup because those two skills are the ones worth practicing. For a closer look at how the sealed approach compares, see our Olababy vs Munchkin comparison.
Spout cup or straw cup?
Soft spout cups have a real job: they are the gentlest first step away from the bottle, which is why the GentleBottle Transitional Set includes a soft sippy spout lid. But a spout drinks much like a bottle, so for the main cup after about 12 months, many feeding professionals point families toward straw and open cup drinking instead. Use the spout to bridge, then let the straw take over.
What about weighted straw cups?
A weighted straw cup puts a small weight on the bottom end of the straw inside the cup, so the straw tip sinks to wherever the liquid is. Your baby can drink reclining, lounging sideways, or holding the cup at any angle, which is why weighted straws are popular for car seats and for babies who will not sit still to drink.
The Olababy 5oz Training Cup with Lid + Straw takes the other route: a straight soft silicone straw under a spill-resistant lid. The honest tradeoffs run both ways. A weighted straw is more forgiving of tilt but adds parts to clean, and the weight and longer straw take more scrubbing. A straight straw is simpler to wash, cheap to replace with replacement straws, and asks your baby to hold the cup fairly upright, which is the habit every regular straw cup after it will expect. If your baby mostly drinks reclined in a car seat, a weighted straw solves a real problem. For table and stroller drinking, the straight straw keeps things simple.
A simple plan by age
- 6 months: start both skills. An ounce of water in a small open cup at the highchair, your hands on the cup, plus straw practice. The First Cup (2oz) is sized so tiny pours look full, and the 5oz Training Cup works lid-on for straw practice, lid-off as an open cup.
- 9 to 12 months: more independence. The Silicone Training Cup adds a weighted base that resists elbow-swipe tip-overs while your baby practices solo sips.
- 12 to 18 months: wean the bottle. Swap one bottle feed for a cup feed and go from there. If your baby is attached to their bottle, the GentleBottle Transitional Set keeps the vessel familiar while the top changes from nipple to soft sippy spout.
- Toddler: open cup at meals, straw cup out of the house. The 9oz straw cup fits cup holders for the car seat years.
Sippy cup with a straw means a straw cup
It is the most common phrasing in the cup aisle and the most confusing, because a sippy cup and a straw cup are two different things. A sippy cup has a valved spout. A straw cup has a straw. When parents ask for a sippy cup with a straw, they almost always want the second one: a lid that keeps liquid in the cup between sips, without the valve that does the drinking for your baby.
That is what the 5oz Training Cup with Lid + Straw is. With the lid on it is a spill-resistant straw cup for the stroller and the car. Spill-resistant means exactly that, not sealed, and only while the lid is on. Lid off, it is an open cup for supervised practice at the table. One cup, both skills, which is why it is the cup we point most 6-month-olds toward first.
Which cup at which age
| Age | Cup at the table | Cup out of the house |
|---|---|---|
| 6 to 9 months | 2oz open cup, an ounce or less, your hands on it | Short straw practice, supervised |
| 9 to 12 months | Weighted open cup, more solo sips | 5oz straw cup with the lid on |
| 12 to 18 months | Open cup at meals while the bottle phases out | 5oz or 9oz straw cup |
| 18 months and up | Open cup, independently | 9oz straw cup, fits cup holders |
Ages are practice windows, not deadlines, and every baby moves at their own pace. If you have questions about your baby’s feeding or swallowing, ask your pediatrician or a feeding therapist.
Where sealed cups still earn a spot
None of this makes the valve cup a villain. White couch, long car ride, church pew: sealed cups exist for good reasons, and plenty of families keep one in the diaper bag through toddlerhood. The mistake worth avoiding is making it the only cup your baby ever drinks from. Keep it in the rotation, not at the center of it. For the full mess-versus-skills breakdown, see our cup guide and the open cup guide.
Questions parents ask
When should I introduce a sippy cup?
Around 6 months, when solids start, is the common guidance for introducing a cup of any kind. Many feeding professionals suggest going straight to open cup and straw practice at that age, and treating a sealed spout cup as a convenience for travel rather than the main cup.
Are sippy cups bad for babies?
An occasional valve cup in the car is not going to hurt anyone. The concern feeding professionals raise is exclusive, long-term use, because the sealed valve does the work and postpones real drinking practice. Keep open cup and straw practice in the daily rotation and use sealed cups situationally.
Which is better, a sippy cup or a straw cup?
For skill building, a straw cup: drawing liquid up a straw is real oral work, while a valve spout pours with a suck-and-tip motion closer to a bottle. For zero mess in the diaper bag, a sealed cup still wins. Many families run a straw cup as the daily cup and keep a sealed cup as backup.
When can babies drink from an open cup?
From about 6 months, with your hands on the cup and an ounce or less inside. Small, supervised sips at the highchair build the lip and tongue control every other cup skill borrows from. A small cup sized for baby hands, like a 2oz first cup, keeps early practice low-stakes.
How do I transition my baby from bottle to cup?
Start cup practice around 6 months, well before you need it, and plan bottle weaning around 12 to 18 months. Offer milk in a cup at one feed first, then swap feeds gradually. A familiar vessel helps: the GentleBottle Transitional Set moves the same bottle from nipple to soft sippy spout.
What is a weighted straw cup?
A straw cup with a small weight on the bottom end of the straw inside the cup, so the straw tip follows the liquid at any angle. That lets a baby drink while reclining or holding the cup tilted, which is handy in a car seat. The tradeoff is more parts to clean and less practice holding a cup upright.
Are 360 cups good for babies?
They are genuinely tidy: the rim seals all the way around and releases when lips press the edge. But because the seal does the spill prevention, some feeding professionals suggest treating a 360 cup as a convenience cup, not the main teaching cup, and keeping plain open cup and straw practice in the daily rotation.
Spout cup or straw cup?
A soft spout is a gentle first step away from the bottle, which is why the GentleBottle Transitional Set includes one. For the main cup after about 12 months, many feeding professionals point families toward straw and open cup drinking instead, because drawing liquid up a straw is real oral motor work while a spout drinks much like a bottle.
What is a sippy cup with a straw?
It is a straw cup: a lidded cup with a straw instead of a valved spout. Most people searching for a sippy cup with a straw want exactly that, because the straw does the two jobs a spout cannot, keeping liquid in the cup between sips while still asking your baby to draw the drink up. The Olababy 5oz Training Cup with Lid + Straw is that cup, and the lid comes off so the same cup works as an open cup at the table.
What kind of cup should a 6 month old use?
At 6 months, two cups cover it: a small open cup for supervised sips at the highchair, and a straw cup for everywhere else. Skip valved spout cups as the main cup at this age. Start with an ounce or less of water, keep your hands on the cup at first, and expect months of practice before it looks tidy.
What is the best cup for a 1 year old?
By 12 months most babies can manage an open cup at meals with decreasing help, and pediatric guidance is generally to start phasing out the bottle around the first birthday. A practical pairing is a weighted open cup on the table and a straw cup for the car and the diaper bag. What matters more than the brand is that at least one cup in daily use asks your baby to do the drinking.
Is a silicone cup better than a plastic one for babies?
Silicone has two practical advantages for this age: it will not crack or shatter when it hits the floor, and it stays soft against gums and new teeth. Food-grade silicone is also non-porous, so it does not hold odors the way some plastics do. The tradeoff is weight and cost, and a silicone cup will still tip if a baby tips it.
What is an infant training cup?
A training cup is any cup sized and shaped for a baby who is learning to drink, rather than a scaled-down adult cup. In practice that means small capacity so pours stay tiny, a soft rim, a base that resists knocks, and often a translucent body so your baby can see the liquid coming and time the sip. Some are open, some take a straw lid.
