You may have already seen this set of ‘Swallows and Amazons’ mugs printed with hand-painted maps of locations featured in my book on ‘The Making of Swallows and Amazons (1974)’.

The three different designs are now available in a ‘classic’ or ‘tall’ style, as a travel mug or a water bottle. The full collection is available here.
Swallows and Amazons map of Windermere
Map of Windermere water bottle available here
and travel mug available here.
Swallows and Amazons map of Derwentwater
Map of Derwentwater water bottle available here
and travel mug available here.
Swallows and Amazons map of Coniston Water
Map of Coniston water water bottle available here
and travel mug available here.
You can see these designs on clothing and other useful items here
These high-quality goods are manufactured in Australia by RedBubble who take care of all custom charges. If you are asked to pay customs, send them a picture of proof of payment of customs charges and they’ll sort it out.
Here’s a link to the help center – https://help.redbubble.com/hc/en-us.
The maps can be found in the paperback of ‘The Making of Swallows and Amazons (1974), available from libraries, bookshops and online here.