Over the last couple of years, we have accumulated several McDonalds Lego Happy Meal Cups from this release and other releases.
We have been re-using them for drinks, both warm and cold and putting them in the dishwasher.
I believe that they are made up of #7 plastic, which contains BPA.
BPA has been linked to some health concerns, hence some products proudly state they are 'BPA Free'.
So, is our current practice safe, or should we bin them/ only use them for play?