No Cons for this product. I am using this product for my daughter for last six months and i am fully satisfied with product. I don't think to change yhis product. It gives the full value of money and best results with baby growth. I recommend this product to every mother and father.

I love these and can’t believe it took me so long to discover them. When they say they don’t spill or leak it is 100% true. The only way that I have seen them leak anything out is if my baby drops it off her high chair onto the floor. The pressure and impact will usually make a tiny bit squirt out. Not a big deal though. I have a 18 month old niece that has used these since she could start sucking out of a sippy and now she uses cups with no lids. I think it has helped her transition from a sippy to a cup great. We still take these when we are out and about so we don’t spill anything.

My daughter was more comfortable than at any time. Fitting was excellent. No leakage for the whole night. After trying this product sample, I am now using this one only. It's amazing at this price. I recommend this product to everyone. Thanks, Merries, for this quality product. Thank you, Merries.