The answers to the clues below will have something in common:

1. Source of unforeseen trouble
2. Carefree life, in a saying
3. Jokester
4. Valentine's Day purchase, perhaps
5. Mean metaphor for a skinny person
6. Common dinner gift
7. Metaphor for dead weight

Answers:

1. Can of worms
2. Bowl of cherries
3. Barrel of laughs
4. Box of chocolates
5. Bag of bones
6. Bottle of wine
7. Sack of potatoes

Credit:
Katherine Omak (#1-3)
CONTAINERS