My dd was agonising about favours, and it was a fairly big wedding. I said not to bother, the vast majority will just end up in the bin. Plus anything reasonably nice (even if basically useless!) worked out very expensive for a crowd.
In the end a SiL found tiny little 'wedding' bubbles, which were very cheap, so since there were quite a lot of children, we scattered lots of these on the tables - many of the adults enjoyed them too.
The other thing dd got in the end (high summer wedding) was white 'wedding' flip flops, for later on, when so many women's feet would be killing them. I will admit that I thought it an unnecessary extravagance, but they were very comfortable - I still have mine over 3 years later - and extremely popular! Not one pair was left.
No equivalent for the blokes, but I doubt they cared.