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There are multiple qualities about this bottle that can be considered good or bad.Pros:1.I like silicone bottles. They don't get permanently deformed over time from being squeezed like hard plastic and I feel more compelled to clean and reuse them for travel instead of being lazy and throw them out2. They look nice3. When you unscrew the clear plastic lid, it has a very wide mouth opening. This is great for filling and cleaning out. You could probably even invert the bottle if you wanted to try.4. It seems like it won't leak in terms of real functionality, but I can elaborate at the end of the reviewPotential Cons / Actual Cons1. It's a little unintuitive, but it's probably best to hold the bottle by the hard white plastic rim when opening the pop top. Constantly pulling on the silicone part probably isn't good for the lifespan of the bottle. This means you're probably going to need to use two hands most of the time, since the lid is decently strong (someone with weak hands might not be able to open it with one hand without pulling on the silicone).2. The main way this bottle seems to prevent leaking from bottle to the clear cap is through a silicone "x" cut in the squeeze hole. This will do a great job trapping liquid in, but it also means it is very hard to get any air into the bottle. Through testing, I found that a squeezed bottle will stay "deformed" temporarily if it is empty (no liquid), and for a long time or permanently if it is filled (the liquid probably forms an even stronger seal). I think this might be why some people in the reviews have trouble with the bottle deforming randomly — I'd guess that the contents of the bottle changed in pressure (for whatever reason). It's easy to re-inflate a partially-filled bottle by very briefly unscrewing the clear plastic top for a second to let air in. I think it'd probably be a better idea to follow traditional leak-prevention methods with hard caps like we see on most squeeze-tube toiletries, rather than using the silicone x slit. The x-slit is probably great (maybe even necessary) for low-viscosity liquids, but unnecessary for most typical toiletries which aren't super watery.With that said,Some people may be interested in removing the x-slit entirely to reduce the pressure issues. I won't explicitly recommend this, but I did a bit of testing on leakage. When I filled the bottle and left it diagonally upside down, nothing leaked out under the white plastic, it only ever leaked between the clear top and the white plastic rim. In one of my images, I numbered the "rings" on the lid top, 1-4, the 1st being a tiny little ring in the center (seems to do nothing), 2nd being a ring that corresponds with the squeeze hole (sits inside the rim on the bottle-side) 3 sitting outside the squeeze hole, and 4 being the actual cap rim. IF liquid were to leak out of the bottle, it doesn't seem like it can escape from being contained within the 2nd ring. Liquid that manages to get into the 3rd ring, however, WILL READILY LEAK. I don't see this happening often (especially not at all if you don't modify the x-slit to a simple hole), but it's good to know. Given that the liquid seemingly does not escape from the 2nd ring (I squeezed liquid into this ring, then held the bottle at a diagonal for an hour at least — did the same for the 3rd), it may be worthwhile to simply cut out the x-slit and see if it improves functionality. I am still debating doing this myself. I tested with my face wash, which isn't watery (just like the rest of my toiletries).I’m a flight attendant, so I’ve tried A LOT of travel bottles of various shapes, sizes, and material. I’ve used these ones a few months now and they’re easily my favorite. They don’t leak at all! Most squeezable bottles are oddly shaped, so they take up more space than necessary and are awkward to pack. These ones are the same shape/size top to bottom, so I don’t have that issue with them. The ONLY thing that would be nice is if these had a twistable label thing like I’ve seen with other ones. They’re different colors, yes, but then I have to remember what I put in each color.First off, these are amazing! Upon reading other reviews, I bought these! They are easy to refill with your favorite products. Easy to get product out while in the shower. The only down fall (like other reviews have stated and why I have this product 4 stars) is that the bottle stays squeezed after getting product out, so I just take off the cap to let air in and the bottle regains it’s shape. Great for travel and no leaking of products! Would highly recommend!I purchased these because they looked cute and super user friendly. These are great travel bottles. However, I filled one with Micellar water. It pressurized overnight and began to eat through the bottle from the inside out. The others I used for shampoo, conditioner, and lotion. I wanted to take my Micellar water make up remover without taking the entire bottle, so I used the extra bottle for that and it just about exploded.These are great if you are flying somewhere for more than 3 days and need more than just average travel sized product. I did only 4 stars because if you just use a normal ziplock quart size bag hardly anything else fits. But I did purchase a zip up tsa approved quart size bag and it fits these bottles and a lot of other stuff! I highly recommend those, but the fact you need to purchase another travel item with these to be functional, they get a 4 star rating.These work really great as far as not leaking but they are hard to label I had to write on them with a sharpie and that even faded a bit plus when you try to get product out sometimes to get too much due to the way the opening works.The colors are really cute.Size is great.Easy to pack.Don't know about leak-proof, or if easy to use yet.Those bottles are perfect for traveling. You can easily fill them with your favorite shampoo/body wash or whatever you like, really. Easy to clean and they also look great! Hope this helps!Very well made, light and the silicone container makes it easy to get the very last drop of your products. Easy to clean and good size for travel as it contain 2-3 times the amount as travel size product you will find at Walmart. Also you can bring your favorite products.Pésima calidad, los acabo de recibir, los llené con crema, acondicionador, etc. No los he ni usado para viajar, en 1 noche se deformaron todos! No los recomiendo! La peor compra que he hecho en Amazon, no gasten su dinero!I bought these for a trip and they worked really well, no leaks or anything, will use this for the gym. The only annoying thing is that if you squeeze it then it stays that shape, have to take off cap for it to get it's shape back. Otherwise good!J’ai acheté ces bouteilles pour leur supposé étanchéité. Erreur! shampooing, revitalisant, gel douche, ils se sont répandus allègrement dans ma trousse de voyage. Et heureusement, je n’ai pas eu à prendre l’avion car j’ai peine à m’imaginer avec la pression de la soute quel dégat auquel j’aurais eu droit! Les ayant essayé après la période permise de retour, je suis malheureusement pris avec. Elles sont très jolies…. Mais ne faites pas comme moi, ne vous fiez pas aux apparences!Used these for my hospital bag. They hold quite a bit. I didn't have any leaks but ive only used once. Not sure how well they would do travelling on a plane.
