There has been some confusion whether light bulbs, soft drinks ( pop, soda, coke, soda pop, fizzy drink, tonic, or carbonated beverage) and tennis balls are dangerous goods or not since they are pressurized.
Below are not considered as dangerous for sea transport
1. Foodstuffs (except UN 1950), including carbonated beverages;
2. Balls intended for use in sports;
3. Tyres (except for air transport);
4. Light bulbs provided they are packaged so that the projectile effects of any rupture of the bulb will be contained within the package.
IMDG Code Compliance Centre 