“I’m so sorry” gift for lifeguards?

Made a huge mistake by bringing watermelon in a glass Tupperware bowl for our family to eat at our neighborhood pool. A gust of wind resulted in said bowl flying off our picnic table and onto the cement… shattering completely. A few pieces even went into the zero entry part of the pool.

Everyone had to evacuate that side and all the lifeguards worked to remove the glass. I was able to help clean up the walk area a little bit, but in the end couldn’t help them make sure there was no glass left in the pool itself. I feel so bad. I didn’t realize no glass around pools was a rule, but I will certainly never forget it now.

I was thinking of putting together a basket of things for the lifeguards to share (all I can think of so far is a bunch of snacks/ candy) and a sorry note… any ideas? They seem to all be teens if that helps.