DS is starting year 1 too. He's using his same school bag as it's the actual school bag and is perfectly fine.

He'll use the same drink bottle but he only got it last term. Lunch box, new one. Trying to figure out a good combination for what he likes to eat, whether it be one with different compartments or a few different containers in an insulated bag.

Shoes - new. His old ones are broken, went through 4 pairs last year!

Anything we buy new that the old is still useable just goes in the cupboard and is used if we go to the park or something.