If you never put your cup down you'll never have to worry about it getting mixed up with someone elses cup.
We are debating the topic. Still like our straw version (like this) at least for the frozen drinks like pina colada and rum runners, but use in the pool is not quite as handy as some of these other ones that seal up better.
I've never had any issues with the mug being filled. Works great too. I've even had a partially frozen drink the next morning haha! 7-11 Mega Big Gulp insulated mug. P7301015
I had one of those mugs and it was so great it kept my drinks super cold and they lasted a while which was good. I even brought it home
Just ordered 3 from asda direct in the uk. Only £13 for all three. Thought I'd use one at night instead of the "not very clean" tumblers at the bar. Sorry guys but I had shits for my whole of my last trip and probably cos of poor hygiene!
