I think you will find that the plastic bits will not stick to the paper pulp. Pulp is mostly cellulose, a complex sugar, and it is hydrophilic (water-loving). Plastics are usually hydrophobic (water-hating). The two will be like oil and water, and they will not mix. Why don't you try putting in little pieces of cotton cloth or silk cloth instead. These are hydrophilic too.Good luck !