Marit Ayin
Question
The weather is getting beautify and it is still mild so I was thinking of taking a nice walk with my 13 year old on Shabbos (within the Eruv) and was wondering about pre-paying for a soda for us at a grocery store which is close to the park. I know that in place like New York I can pay for a dinner for Shabbos ahead of time...but I am not sure about a soda or any similiar item. Thanks