Ice Tea

I purchased a bottle of Lipton Ice Tea which is currently on special at Pick n Pay. It took nearly 40 mins to try and open the bottle. We tried, my husband tried, we cut the tab around the lid area hoping that would help and even ran the bottle under hot water. What concerns me is I bought this ice tea for my grandmother and she couldn't open it on Saturday when it was purchased, we had to go to her house yesterday and it took 40 mins to try and open the bottle. I really think that this needs to be looked into because its not right that these bottles are not easy to open and if it weren't for us visiting my gran she wouldn't be able to drink her ice tea. Like I said a grown man could not open this bottle. we used a knife and battled for quite some time.