1. Ear Plugs
Sri Lanka is a very noisy country especially the urban areas. Many of the private transport buses play their music at the loudest volume which is highly irritable and bad for health. There is no law affecting them which encourages them to play at whatever level of volume they think is sufficient to torture the passengers. Therefore come ready with some good noise cancelling earplugs.
At night you will wake up to the noise of three wheeler taxi music which is another way of sound pollution in Sri Lanka. Or if you are sleeping in a hostel your neighbour might snore the whole night. Ear plugs maybe tiny things but they will decide how happy you are the next morning.
2. Mosquito repellent
These are available in Sri Lanka but you may bring your favourite if you feel like so. You will find mosquitoes everywhere in Sri Lanka except for the cold areas such as Nuwara Eliya. Although many tourist hostels and hotels have mosquito nets you might need some repellent oil for the evenings. Else you will be mosquito dinner during your 2 weeks in Sri Lanka.
3. Sun lotion
A good sunscreen is an essential item if you are planning to spend a day in the coastal areas or other lowlands such as Polonnaruwa, Sigiriya, Trincomalee, Galle, Weligama, Matara etc. The scorching sun will have no mercy when he shows up in these areas. There are sunscreens available in Sri Lanka but if you are a brand concerned person then bringing your own sunscreen is the best thing to do. If you stay 2 weeks in Sri Lanka without sunscreen you might turn into charcoal, who knows? Don’t take the risk. Yes that was a joke but true.
4. A wearable pouch
This will come in handy when you go on a hike or when you visit a place like Sigiriya and Polonnaruwa. As there are hostels and hotels in these areas you may only need your essentials with you. A wearable pouch will prove to be an essential item at places like that just to keep some money and passport and entrance ticket etc. at hand. Oh and your sunscreen.