ProductFloatAnimation.cs

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using UnityEngine;
 
 
public class ProductFloatAnimation : MonoBehaviour
{
    // ------------------------------------------------------------------
    // Inspector fields
    // ------------------------------------------------------------------
 
 
    [Header("Float")]
    public float floatAmplitude = 0.05f;
 
    public float floatSpeed = 1.2f;
 
 
 
    [Header("Tilt")]
    public float tiltAmplitude = 2f;
 
    public float tiltSpeed = 0.8f;
 
 
    // ------------------------------------------------------------------
    // Private state
    // ------------------------------------------------------------------
 
    private Vector3 _startPos; 
    private float   _offset;   
 
    // ------------------------------------------------------------------
    // Unity lifecycle
    // ------------------------------------------------------------------
 
    void Start()
    {
        _startPos = transform.localPosition;
        _offset   = Random.Range(0f, Mathf.PI * 2f);
    }
 
    void Update()
    {
        float t = Time.time + _offset;
 
        transform.localPosition = _startPos + Vector3.up * (Mathf.Sin(t * floatSpeed) * floatAmplitude);
 
        float tiltX = Mathf.Sin(t * tiltSpeed * 0.7f) * tiltAmplitude;
        float tiltZ = Mathf.Cos(t * tiltSpeed)        * tiltAmplitude * 0.5f;
        transform.localRotation = Quaternion.Euler(tiltX, 0f, tiltZ);
    }
}