You asked:
I'm looking for a dildo that is almost as solid as glass but with a lifelike, softer outer surface. I've purchased several that were advertised as firm but ended up being too flexible for anal play. Can you recommend a brand or specific product?
Grace:
The firmest dildos I've come across are from Tantus. Although it's been a while since I checked, their larger range typically maintains this denser feel you're looking for. You might find their Cone model especially suitable—it offers the solid, firm core you desire with a more lifelike exterior, ideal for sitting on and anal play.
Read more about Grace on our author page.