Philips Aventถ้วยหัดดื่ม

I have tried few straw cups and my son loved his avent dinosaur cups from the day one! And he’s 16 months and still his favorite! No leak, not easy to open for him and easy to wash!

I have bought this style of straw cup three times before and no problems. I bought it again just this weekend at a Big W store and the top straw part with the circular silicone part keeps going down when my toddler zips from it and I have to keep undoing and pushing back up into too backing part. Abit disappointed because as I said the other 3 bottles never had this issue. I think it may be manufacturing defect / fault variation in the manufacuring of the top part of silicone straw part?

Throwing this away as my 7 month old can open it with ease. Please note it is recommended for children 9 months + so didn't think this would be an issue. He quickly discovered within minutes of having this how to unscrew the bottle and tip the cup upside down causing water to go everywhere. I tested it several times (without water) and he undoes it every time. I rang Phillips to discuss the issue. They said it was unusual and maybe my child was just clever. I told them I would have to not use it and was told nothing could be done. Would not offer a refund or return. Also had no other product to recommend.