Light-up ducks, floating sets, fishing and squirting toys. The engineering question in this category is never the mould — it is whether water can get inside, and whether it can get back out. The seal, gasket and submersion-testing notes sit in the first article.
Sourcing
Specify a bath toy that survives the bathroom
Send the shape, the age range and the retail channel, and we will tell you which seal construction fits before we quote.