Breaking a bowl, coffee mug or plate can happen. And we're used to it. It can happen. 😁 There's no charge for that and no need to replace it. No worries.
Also, in lots of cultures around the world, shards bring good luck. 🍀
Only when you leave/forget items at a campsite or lose it along the way, you must replace it at your own expense. For example, the following items that travellers occasionally lose or leave behind somewhere:
Fuel cap left at gas station while refueling your Spaceship. Please replace it.
Camping chairs left behind at campsite. Please replace 'em.
Part of the cooking gear - pan, collander, cutting board, kitchen knife etc - left behind in kitchen of a holiday park. Please replace it.
Duvet left behind at a campsite. Please replace it.
This is about the bigger or more expensive items, like cooking gear, the gas cooker, a duvet or an optional accessory such as a camping chair. If you lose a small piece of cutlery like a fork, no worries: no replacement is needed. The same goes for a broken plate or mug.
And what about the coffee mugs with the Spaceships logo and a fun slogan on them? Those are yours to keep, free of charge. They have a little message at the bottom - 'feel free to take me with you' or 'please take me with you' - so feel free to take your mug home as a souvenir of your #SpaceshipsRoadTrip.