Product Empties & Products I Regret Buying!

Product Empties & Products I Regret Buying

I've not done one of these in a while as I haven't had loads of empties and wanted to make it worth while for you guys. For me even if I buy something and I'm not too keen on it, I do like to use it up as it's a waste, this helps me make my decision fully if I would buy it again. Hope this helps out some of you when making future purchases!
What's your current favourite Beauty Product you buy again and again?