Originally Posted by llazy_llama
The Coopers tabs have plenty of bad press out there, but none of it comes from infection. As Groos said, carb away.
I think you're mixing products.
Munton's TABS can leave some residual floating chunks in the bottle that some have complained about, but they have the advantage of being able to set specific carbonation levels. I like them for bottling low carbonation beers like milds, etc.
Cooper's DROPS are simply pre-sized chunks of sucrose / glucose. No floaties but they only come pre-sized for 12oz bottles. I've used them for several years to carbonate the balance of my batches after filling Tap-a-Draft bottles.
Either is clearly more expensive than fixing up your own priming solution, but they definitely are convenient and save time as you can bottle straight from the fermenter and not mess with a bottling bucket. As others have confirmed, no risk of infection as long as your hands are clean and dry.