My sister or I used all of them a couple times a day for a week or two. Here are the results. All in all, I think all of these are good options for shoeboxes. All come individually wrapped. I think you just need to look at your price point, how many shoeboxes you'll be packing (do you prefer buying 144, or ten times that many), and also, with one costing half as much another, you could also send two for the price of one.
Toothbrushes (4861). These are sold for $60.39 for a case of 1440 so about 4 cents a piece. These don't look too sturdy, and have a thin handle, but actually seemed to work well. It was a little on the firm side, but not bad. It held up just fine, no lost bristles, I think it's a perfectly good option for shoeboxes, and at the cost, you could even possibly send two!
Toothbrush - 46 Tuft White Nylon Bristles, Green Handle (TB46) These are $86.71 for a case of 1440 so about 6 cents a piece. The shape of this handle is closer to current toothbrushes, being angled. It felt good to brush with. It wasn't as stiff as the other two, was a softer toothbrush which I liked, but it did cause the bristles to not look so good after use, but still worked fine, and didn't actually lose any bristles. Another good shoebox option.
I hope this review helps someone...if you have any further questions, please just ask!
Disclaimer: I received these products free to review, but the opinions are all my own.