"Each Tonke is custom-designed. Ours was the smallest version, but still felt about three times as big as your classic VW campervan, with so much headroom that only the tallest Tonke-user would need to duck. At one end was a full-size double bed, at the other a wooden table and chairs that could pop down into a third bed. Between them was a pretty comprehensive kitchen (complete with fridge, double gas burner, oven and porcelain sink) and a shower and toilet compartment. What there wasn't was any hint of kitsch. Instead the snug interior was all clean lines, bold red and blue furnishings and lots of dark wood. 'Holland has a tradition of classic yachts from the 1920s and 1930s that's definitely visible in the Tonke interiors,' Maarten explained. 'Gypsy caravans are often ornate, but I prefer the plainer yacht style - lots of mahogany and gloss.'"