Bought this initially as a training straw cup. We first got the big one and eventually purchased this small one too. My son loves it instantly. He likes the vibrant color and interested so much on how the straw magically disappears. The material is nice plastic with rubber texture for grip. We've never really had a problem of the cover easily opening up when turning the straw out. Easy to wash.

We first got the bigger version of this one but turned out to be too big for my kid so we bought this next. Perfect for short travels errands. Fits in the pria cup holder and car cup holder. Fits in stroller cup holder too without the sippy cup handles. We love it. I know some people have complained about the cup opening up when you release the straw but that has been never the case with us.

We didn't use sippy cups at all and went straight to straw cups. Our son started using this sippy cup at 8 or 9 months, after we tried some other brands. He's able to hold onto the cup--no handles needed. It doesn't leak and the straw reaches to the bottom of the cup. It's also short enough for a pre12-month-old to use. If you are shopping for sippy cups, I would avoid ones with a straw that angles into the liquid.

when i twist the upper part of the lid to get the straw out for my son to drink, the bottom part would sometimes twist open as well. so i have to hold the bottom part to prevent spilling. i don't know if mine was a defect or it's just a poor design. however, the cup itself is very easy to clean, no complicated small parts like other cups i got for my son in the past.