I want to whiten my teeth but can’t afford really expensive stuff. What’s the best that I can buy at a drug store.

I really want whiter teeth, but I can’t afford to spend a lot on professional dentist whitening. I would like something that I can buy at Shop Ko or WalMart or something. I want it to be HEALTHY for my teeth and EFFECTIVE so my teeth get lots whiter. Please recommend! Especially dentist recommendations! Thanks.

I went to the store and most are pretty expensive. but there is trays, swabs, strips, and all sorts of different ones. Which ones are the most effective and will give me the best results for my money. I do smoke and drink lots of coffee so my teeth need some whitening