Fix shelves onto tiles - what fixing

You can get shelves which use a twist lock vacuum fixing and ones that glue on if you don't want to drill.

 

just use red plugs , spot of clear silicon btwn fitting and wall.

 

Trouble is plugs into PB wall will soon work loose I recon. Couple of large bottles of shampoo / conditioner can be heavy

Would be better to screw into studs, noggins but knowing where they are under the tiles may be a problem

Stainless steel screws are a must - possibly supplied with shelves but a lot of supplied fixings now are rubbish

I've always pumped some silicone into rawlplug before adding screw. Maybe not essential but I like the idea anyway