I only leave a container of non-dairy creamer in its original container with a sealable top. The nice thing about the non-dairy versions is that they have a longer shelf life. Also, I use non-dairy creamers so when it gets close to the expiration date, I take the remainder for myself and put a new one in. If you insist on dairy-based creamer, get a lactaid-free one which also has a long shelf life. I have found that guests will not touch a bottle of juice or milk that has already been opened, but are okay with a creamer. I also leave cans of seltzer. @Sue2128