I wanted an eco option for my children's water bottles. The packaging was sturdy and recyclable. Actually, i'm going to use the boxes for crayon storage! The curvy shape of the 350ml bottles is lovely for little hands to hold and my kids ( 5 and 3) can manage the flip up straw easily and they love drinking from them. They are drinking noticeably more than their previous sports topped bottles so I think it is easier for them to drink from. My 5 year old takes her 500ml insulated bottle to school and it is working out well. Very happy with these bottles and the colours are great. Also loving the bottle cleaning brushes, thank you.