Hair shampoo and conditioner bottles are rigid plastic.
This should be placed in the household recycling bin.
Make sure bottles are empty before placing them in the recycling bin. Turn them upside down to use up all the product before disposing of them.
If you are want to reduce the amount of plastic you generate look out for solid versions of soap and conditioner. Eco Stores, health food shops and certain pharmacies sell these products. They can also be purchased online.