I agree with what most have said about not needing too much money at school. Our DS requests Visa gift cards for his birthday as he can use them to get take out and the occasional trip to the movies. Our school has a student account from which kids can take out cash up to a reasonable limit. You can opt to have it automatically funded or add when necessary. We found that our son didn’t use much.
Another recommendation is an Amazon account. Our son has access to our account and we have prime membership. Even though we live reasonably close by it was very helpful for him to be able to,order things he needed. With a very cool spring he needed compression pants to keep warm during track practice. He just let us know what he was buying and it was delivered in two days. It was so much more convenient than driving up there whenever he needed something. He used it for toiletries as well, not to mention that his favorite ramen is even cheaper there than at the grocery store.