Where do Pyrex and heat-resistant glassware go?

Bottle and jar glass is soda-lime, melted and reformed at a tightly controlled temperature. Ovenware is different by design: older Pyrex and laboratory glass are borosilicate, with a much higher softening point, and most modern kitchen ovenware is heat-treated soda-lime. Either way a fragment does not melt with the rest of the batch and leaves a hard inclusion, a stone, that weakens every container made from that melt. That is why glass banks and kerbside glass collections exclude ovenware absolutely — take it to a household waste centre for general disposal, wrapped, or donate it intact. No local scheme accepts ovenware in the glass stream, so this is one rule that does not change between councils.

How to prepare it

1. Donate intact dishes; they last decades.
2. Wrap broken pieces in newspaper and tape the bundle before it goes anywhere.

What not to do

• Never put Pyrex or any ovenware in a bottle bank or glass bin — one heat-resistant fragment can ruin the batch it is melted with.
• Never assume clear glass is all the same glass.

Kerbside collection rules genuinely vary by council and county, and local rules always win over general guidance. The reasoning above is what transfers — if your service differs, it will usually be for a reason described here.

Other things that go to household waste recycling centre

• Leftover wet paint Household waste centre or a community paint reuse scheme. Liquid paint is not accepted in any household bin.
• Car batteries (lead-acid) Garage, scrap yard or household waste centre. Lead-acid is the most successfully recycled consumer product there is.
• Used motor oil Household waste centre oil bank, or a garage that accepts it. One container of it contaminates an enormous volume of water.
• Small electricals (kettles, toasters, hair dryers) Electrical waste. Household waste centre, a shop take-back point, or a kerbside small-electricals sack if your council runs one.
• Televisions and monitors WEEE recycling. Old CRT sets contain several kilograms of leaded glass.
• CFL energy-saving bulbs Household waste centre or a shop take-back point. They contain mercury and must not be binned.
• LED bulbs Small electricals recycling. No mercury, but they are electronics, not glass.
• Drinking glasses and wine glasses Not the glass bin. Tableware glass has a different composition from bottle glass.
• Smoke alarms Household waste centre or manufacturer return. Ionisation alarms contain a tiny sealed radioactive source.
• Crockery, mugs and ceramics Not glass and not recyclable at the kerb. Donate what is whole; broken pieces go to the household waste centre or general waste.
• Fluorescent tubes Household waste centre, intact. Mercury inside, and a tube that breaks in transit is a spill.
• Camping gas canisters and butane cartridges Household waste centre, as gas cylinders — not the metal skip and never a bin, whether or not they feel empty.
• Fire extinguishers Household waste centre or a fire equipment company. It is pressurised until a professional has discharged it.
• Mirrors Household waste centre. The reflective backing means it is not recyclable glass.