I do not participate in anything involving "shots" of any kind, but I needed small containers because I have food in my bedroom and when I tried keeping jam in my room it ended badly with a nice bunch of ants when jam got on the outside of the jar.
So, since my bedroom is upstairs and my kitchen is downstairs, I bought these cups to transport just a little jam at a time, no more than I'd need for some bread I like to keep up here. These work perfectly for that. Plop some jam in, put the lid on, carry it upstairs, keep it til I am ready to use it, put the lid back on it when I am done with it, no mess on the outside of the container, toss it in the trash, repeat as needed.
The price was alright, not great, but you get a zillion of them for your money and they are sturdy enough you COULD reuse them if you needed to. The lids are about as sturdy as lids you find in a fast food joint though, so you'd need to make sure to be careful with the lid if you plan to reuse the container.
You can use these for jam, syrup, ketchup, mustard, relish, etc. They are exactly the same containers used in restaurants everywhere when you order takeout.
Now after writing this review I want some jam .. sigh .. going downstairs now, LOL.