Here is a useful table for finding a suitable material to adhere glass to. From this table the most practical match for pyrex is wood. Since these two materials have almost the same expansion and contraction properties, the adhesive layer may be kept thin. Silicone adhesive does not adhere well to wood, but this can be overcome by drilling a hole for each pad and allowing the adhesive to fully penetrate the hole. The holes may also be tapped with a thread or stepped beforehand for additional strength.

It goes without saying that the wood must be sealed against moisture.