Prohibited Goods
You are not allowed to bring in goods that are prohibited under Singapore laws. 
The list of prohibited goods includes (but not limited to):
- Chewing gum (except oral dental and medicated gum) 
- Chewing tobacco and imitation tobacco products (e.g. electronic cigarettes, etc) 
- Cigarette lighters of pistol or revolver shape 
- Controlled drugs and psychotropic substances 
- Endangered species of wildlife and their by-products 
- Firecrackers 
- Obscene articles, publications, video tapes/discs and software 
- Reproduction of copyright publications, video tapes, video compact discs, laser discs, records or cassettes 
- Seditious and treasonable materials 
It is an offence if you attempt to bring any of the items listed above into Singapore