Royal Blue Solid Heart Foil Balloon 18". The heart-shaped aluminum foil balloons can be used for Valentine's Day,birthdays,weddings,anniversaries and events,romantic love party balloons decorations. Combine these with other party supplies or mix with printed and other solid tableware to personalize your party table and party. You can celebrate with a bang! Balloons are made with high quality latex with metallic luster, safe, non-toxic and odorless. The balloon surface is of uniform thickness after inflating the balloon.