It works fairly well, though it wont work for just one or two cloves and occasionally a peel makes it out intact. I’m not sure what sort of shaker would work best. I use what’s essentially a Boston shaker, except I use a smaller metal mixing cup over a pint sized glass. Its a lot less unwieldy than a full Boston, with much less chance of breakage or a locked shaker. But I think the cobbler style shaker might work better for garlic, less space inside so the garlic would ding around a lot more. I hate those for actually making cocktails though, Messy and slow, so I don’t keep one around to check.