The flowers are out! Come out and play.
The sun is hot and bad moods are out of place. It is, essentially, picnic-time. You need containers that won't melt under the sun. Put hot or cold meals in stainless steel tiffins and worry not about leaving them on the shore while you swim. Great for lazy, cooking-free days of chilled fruit.
Small cups also help. You don't want to take a plastic cup out. These will hold a modest cup of coffee or water. You can also plunk some ice into a cup of red wine. Don't say it's not done that way because it tastes good.