Stingy stingy!!!!!

Today after school I took a bus to back home and I always get off at mccully shopping to get some drink or shave-ice at coffee or tea cafe.I like to go there because the stuff were very nice ,but today was different .I was there to buy shave-ice and The lady who might be the manager asked me"Do You want the cap"and I said"yes" ,I paid my bill and sat on the chair while I'm waiting for my order. The girl who was working there long time gave me shave-ice and I took shave-ice back to my seat .Just about opened the cap The lady came to me and said "Do you want to eat here?" "yes"I said "so I have to take plastic bag" she said @_@!!!!"OK!" I answered and she quickly took plastic bag from me.What just happened to me!!!!!!.Just plastic bag!! that you wanted from me.After, I had one bite of shave-ice before left that place with a container of shave-ice  on my hand with out plastic bag and thought "what I had done""did I do something wrong".It really made me upset .Now I will not return to that place anymore even you have a lot of people to buy your drink ,but oneday you will lose that people form being stingy.Thanks to listen to me .(I didn't take any bite of shave-ice ,I gave to my friend.)