Which bin for tea bags and coffee grounds?
Usual answer in the UK
Food waste Food waste caddy
Used tea bags and coffee grounds go in the food waste caddy or home compost.
Also possible: Garden waste bin.
Does every council do this?
Most councils follow the answer above, but bins and sorting rules are set locally, and a few councils still do things differently. If your bin has a sticker, or your council sent a leaflet, follow that. Enter your postcode to go straight to your council's guidance.