Bottle Cap Filtration for Microplastic Removal at Consumption

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Solution Overview

Problem

Billions of disposable plastic water bottles are discarded annually, posing environmental and health risks due to micro-plastic particulates leaching into the liquid, which can cause health issues such as cancer and endocrine disruption.

Innovation Solution

A cap-based filtration system designed for disposable plastic bottles that filters micro-plastic particulates at the point of consumption, compatible with various bottle designs, and can be single-use or reusable, using various attachment methods and filter cartridges to remove contaminants from liquids as they are drawn from the bottle.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If disposable plastic bottles are used for liquid storage and transport, then convenience and portability are improved, but micro-plastic particulates leach into the liquid causing health risks

Engineering Contradiction:

Improveconvenience of liquid storage and transportVSAvoidmicro-plastic particulate contamination

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

A filtration system is introduced as an intermediary component between the plastic bottle and the consumer. The filter cartridge with filtering media acts as a mediator that allows liquid to pass through while blocking micro-plastic particulates, thus maintaining the convenience of using disposable bottles while eliminating the harmful contamination

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The harmful micro-plastic particulates are extracted or removed from the liquid stream through the filtration system. The filtering media captures and retains the particulates, allowing only the purified liquid to reach the consumer, thereby separating the useful liquid from the harmful contaminants

Inventive Principle:

Principle #2Taking out (Extraction)

2Object-affected harmful factors

If a filtration system is added to remove micro-plastics, then consumer safety is improved, but device complexity increases

Engineering Contradiction:

Improvemicro-plastic particulate removalVSAvoidfiltration system structure

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The cap assembly is designed to serve multiple functions: it acts as both the closure for the bottle and the housing for the filtration system. The filtering media is integrated into the cap structure, allowing a single component to perform both sealing and filtration functions, thereby reducing overall device complexity

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The filter cartridge is nested within the cap assembly housing. The filtering media is contained within the cap structure, creating a compact integrated system where one component is placed inside another, reducing the number of separate parts and simplifying the overall device architecture

Inventive Principle:

Principle #7Nested doll (Nesting)

3Loss of substance

If a reusable filtration system is implemented, then environmental impact is reduced through recyclability, but manufacturing and disposal processes add complexity

Engineering Contradiction:

Improveplastic waste reductionVSAvoidmanufacturing and disposal process complexity

Core Design Contradiction:

Loss of substanceVSEase of manufacture

Solution Approach 1:

The filtration system is divided into separable components: a reusable cap assembly and a disposable filter cartridge. This segmentation allows the durable cap to be reused and potentially recycled, while only the consumable filter cartridge needs frequent replacement, reducing overall plastic waste and simplifying the manufacturing process for each component

Inventive Principle:

Principle #1Segmentation

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Effectively removes micro-plastic particulates from liquids, ensuring consumer safety by providing filtered water, and can be designed for recyclability or replacement, addressing both environmental and health concerns.

Implementation Method 1

a filter subsystem for attachment to a container opening of a container holding a liquid, and through which filter subsystem the liquid is filtered and consumed

Methodology Applied

Scientific EffectPhysical filtration: Filter (physical)

Data Source

PatentUS20250346500A1Filter system for handheld containers of consumable liquids

Publication Date: 2025.11.13 DEROSA RICHARD

AI summary

A cap-based filtration system compatible for mounting on numerous varieties of disposable and non-disposable plastic containers and which filters out at least micro-particulates (e.g., plastics) introduced at least a part of the manufacturer bottling process when consumable liquid is inserted into the plastic containers. The filtration system now functions as the cap to the bottle to prevent leakage of the liquid from the bottle and to assure the user that the liquid being drawn from the bottle is free of at least micro-particulates. The cap filtration system can employ a variety of replacement filters of differing container dimensions for utilization on containers of equally differing volumes and dimensions.