Probably the best idea is to begin by thinking about your soccer team and what might work the best for them as salespeople in your soccer team fundraising effort. If this is a children's soccer team, for example, you'll have to consider whether they are old enough to go out fundraising themselves, and what this will mean in terms of their customer base for your soccer team fundraising ideas. In other words, if the kids are doing the selling they may be likely to target their friends and fellow students at school, whereas if the parents are doing the bulk of the work, then your fundraiser would probably be better targeted toward adults.
If the kids will have permission to sell on school grounds to their fellow students, then you will probably want to look at soccer team fundraising ideas that are snack-based. There are all sorts of soccer team fundraising ideas like this out there - anything from the classic chocolate bars, to some healthier choices like Welch's Fruit Snacks.
On the other hand, if your customer base is going to be adults, select soccer team fundraising ideas that will appeal to them more. Brochure-based fundraising ideas, tea, coffee, or even cookie dough can work really well if adults are your customers, but you just have to go with what you know about your community, and base your soccer team fundraising ideas on that.