Slime Inner Tubes

Has anyone tried these out? https://www.tredz.co.uk/.Slime-Pre-Fill ... AQAvD_BwE#
I cycle on some roads where I'm prone to a puncture - are these worth the investment?
I cycle on some roads where I'm prone to a puncture - are these worth the investment?
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The fact is, punctures happen very occasionally and sometimes it doesn't matter what preventative measures you have taken. The best thing you can do is carry a spare tube and the tools you need to change a tube.
I assume you're British, we all ride on the same roads and manage without gimmicks like slime filled tubes.