I would've put an example in the title but it couldn't fit. I get the TropiClean Fresh Breath Water Skin and Coat Additive 473 ml for my dog. It says the price used to be $24.95 but I bought it in Aug for $16.22 (can't remember if it was a deal). Either way, $12.48 now is still cheap.
I can't really judge the 'Skin and Coat' benefits of it but my dog's breath is definitely better with it.