Lunchbox trends for school return

I have been reading about Mum on social media displaying what will be in lunch boxes this autumn. Some of it a little extreme but what annoys me is the weight of the rucksack my 8 year old granddaughter takes to school. Are there no taps in school? Does she really need such a big water bottle? Add a gym bag and some days a violin and she looks like a little pack horse. Can’t be good for her back