I have to admit, I was initially dubious about these as I thought, `paying money to watch something fly away doesn't seem that appealing'. After a break away over New Year, I saw people letting these off over a frozen(ish) river and I have to say that it was quite spectacular with fireworks going off in the background.
I bought these and the pack contains four lanterns which are very well packaged. They are very fun and do make a moment quite special especially watching them disappear into the distance - I also have the fun game of seeing other lanterns and saying, `that might be mine'.
I'd like to try the other suggestion of attaching fishing wire to keep them from flying off. Overall, if you are going to buy them, really are fun and you won't regret it.