On second thoughts, maybe the reason my Aeropress plunger has never slipped is that I brew upside down. So the water is heating the rubber while the grounds are brewing. And the rubber expands more than the plastic of the cylinder.
On second thoughts, maybe the reason my Aeropress plunger has never slipped is that I brew upside down. So the water is heating the rubber while the grounds are brewing. And the rubber expands more than the plastic of the cylinder.