Shooters

Have any of you guys had a shooter that once you twist the lid off there’s some “grains of sugar”. I go to a local bodega and every single time I buy a 99 shot there’s some residue on the lip. It’s some solidified stuff that I can’t explain. Has anyone else gone through that or am I just drinking some old shit that the liquor stores never sell? Sorry if what I’m talking about doesn’t ring any bells, I just want to make sure what I’m drinking is as safe as it can be. I don’t want to be drinking something with some foreign chemicals or whatever