Boon Snug Sip Universal Water and Juice Silicone Bottle Toppers - Soft Spout Conversion Caps with Spill Proof Valves - Silicone Bottle Covers for Travel - Includes 4 Bottle Toppers and 4 Cases

These are INCREDIBLE! I got them for my 13 month old to be able to drink from water/milk/juice bottles on the go. They fit perfectly on each bottle, and my son had no issue getting the drink to come through. I love all the colors! They seem like really good quality, nice and thick. I definitely think these will be durable enough to get us through this stage. For the money, these are exceptional. We are super happy with this purchase.

These are so cool! We are often traveling and it's getting harder and harder to find straws to use in my toddler's drinks. These not only fit on common single use bottles, but they also fit on our narrow neck Nalgene bottles, making it easier for him to drink from what we already have. The cases mean I can throw a couple in the diaper bag just in case we forgot our reusable bottles or go somewhere that we can't bring our own drinks. The flow is pretty slow for an adult, but even I will probably use it on my Nalgene while driving so I don't have to take my hands off the wheel to unscrew the cap it came with!

Works as expected. Good to have for on the go. Just keep an eye on your kiddo if they are rough on cups. Not something I would use in place of a leak proof sippy cup but perfect in a pinch and on the go.

We did not like these, my poor daughter tried and tried to get the contents of her drink out and it did not work insted the top popped off and her drink got all over her and our car.

These are a lifesaver! I have ended up at the ball fields twice recently without my toddlers straw cup. He’s not able to freely drink from a standard water bottle without making a mess. I ordered these on a whim and immediately placed them in the backpack when they arrived. They fit perfectly on standard water bottles (I have not tried anything other than water yet). He was able to drink from it without any spilling all over himself! I then washed in the sink and dried for the next time. Since these come in a pack of 4 I was able to easily pop another into the backpack to be ready for the next outing.

To put it simply, it needs an air inlet valve. It's okay for kids that are only sipping.In general, this is everything it says it is! Fits on a typical water bottle (generic water bottle verified) and sports drink bottles (Body Armor verified). It will not spill and the nozzle's cap fits tight over the nozzle. I have even dropped it (for testing) and it stayed on. Also, the cap/nozzle didn't look any worse for wear after the drop since it is all a very stiff and thick silicone piece. So good on durability.The problem is the function as a drinking nozzle! As an adult I test these things to guide my kids. The vacuum force needed to drink is a bit surprising. Lightly biting the tip of the nozzle helps, similar to how you might for a camelback nozzle. From there the problem is the back pressure in the bottle. The cap doesn't have a way for air to go into the bottle as you draw on the nozzle. This causes a vacuum inside the bottle and if the bottle doesn't give, then you're gonna have a bad time. Luckily most bottles do give. Body Armor bottles don't give and it makes drinking from them like lighting a cigar though a coffee straw.So, yes, it's a great cap, but don't use it for chugging drinks like a parched athlete. Cheers!

Amazing product it's a 4 pack so I could keep one at home and passed the other 3 out to family members who care for my Grand daughter .love that I can add it to any bottle so that if I don't have a baby bottle my Grand baby can drink sadly from any bottle.

The media could not be loaded. Okay! Yay! So my kid is prescribed PEDIASURE and I've BEEENNNN looking for something that you can just pop on the bottles. She wont drink it from a straw so Until recently we just used the dr brown bottle neck rings with the sippy cup nipple/spout, but with her needing to take lunch to school now I wanted to see if I can find anything that looks less like a bottle. (I had no rush to ween her off, but im concerned her teachers mightve lol) anyway everything was either too small, like for water bottles or too big like for Gatorades and this fits the pediasure 8oz bottles AND she uses it. I saw a review that said these fit the milk bottles from McDonald's so I thought DING DING DING! I did slit the cross/openings with a Knife all the way thru the edge of the top for more flow, less resistance, therefor less spillage. Teach kids to bite first, then drink. They do spill if squeezed or if they don't let air flow in between drinks. Might also spill if not upright, but keeping them around and just swapping the tops out is fast enough so no need to have them on already to carry around. The little carrying cases are great too because I just throw then in her lunchbox and her teachers know how/when to use them. Literally obsessed with these. HIGHLY RECOMMEND .(Adding video of how I slit them a little more open, not a defect)