I couldn’t resist, and so I thought up a few good excuses to buy myself and my daughter a Sigg Aluminium water bottle each. We’ve been using and reusing plastic water bottles for years, until they start to get “past it”. So here are the excuses:

• BPA - Bisphenol A, a very useful molecule when used in the production of plastics and a  potentially nasty chemical that could interfere with many biological functions. It’s best to avoid this where possible in order to reduce overall exposure. The new internal lining of the SIGG bottles is reported as not containing any BPA, but no one really knows what it does contain.

• We (all of us) produce rather a lot of plastic waste . So any way we can cut this back is a really good thing. Using a SIGG bottle for years will help.

• SIGG bottles are robust and the internal lining will bend and stretch without breaking (to a certain extent).

• SIGG bottles can be used to hold water (obviously), fruit juice and carbonated drinks. I’m also trying to find out if the internal lining can take hot water too. I’d like to use the bottle as a hot water bottle when I’m camping in cold weather.

• SIGG bottles look cool.

True the aluminium bottles are a little heaver than the plastic equivalents, but the extra weight is worth it. I’m also ignoring the possible links between aluminium and Alzheimers.